Script that outputs a script that prints a given input

Question

Write a piece of code that takes a string as input, and outputs a piece of code in the same language that, when run, will output the initial input string.

It must be able to handle any combination of characters A-Z, a-z, and 0-9.

Example in Python:

import sys
print "print('" + sys.argv[1]  + "')"

Given the input of testing123, it will return print('testing123').

Since this is code-golf, the shortest answer in bytes will win.

Answer 1

pl, 0 bytes

Code:

Try it online!

Explanation:

An empty program in pl is simply a cat program, outputting the exact same as the input.

In pl, all ASCII characters are essentially variables, but when the variable doesn't exist (yet), pl assumes that they are part of a string.

Answer 2

brainfuck, 56 55 33 bytes

1 byte saved thanks to Gravitron, and 22 bytes saved thanks to Jo King!

--[>+<++++++],[[->.<]>+++.--.-<,]

Try it online!

Output requires an interpreter that wraps on memory underflow and has EOI=0. TIO has such an interpreter.

Explanation

--[>+<++++++] initializes the tape with a single +.

The input loop:

,[[->.<]>+++.--.-<,]
,                     take input
 [                ,]  while input is nonzero:
  [->.<]                  output `+` input times
        >+++.             output `.` (`+` + 3)
             --.          output `,` (`.` - 2)
                -<        restore `+` and move back to input

Other solutions

Each line is its own solution.

+++[>+++++<-]>[>++++>+++<<-]>>-->,[[-<.>]<+++.---<.>>,]
--[>+<++++++],[[->.<]>+++.++++++++++++++++.-------------------<,]
++++++++++[>++++++>++++>++++<<<-]>>+++>++++++>,[[-<<.>>]<.<<.>>>,]
++++++++++[>++++++>++++>++++<<<-]>++>+++>++++++>,[[-<<.>>]<.<<.>>>,]

Answer 3

Mornington Crescent, 27640 bytes

Take Northern Line to Moorgate
Take Circle Line to Moorgate
Take Circle Line to Westminster
Take Circle Line to Hammersmith
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Barbican
Take Circle Line to Victoria
Take Circle Line to Victoria
Take Victoria Line to Seven Sisters
Take Victoria Line to Victoria
Take Circle Line to Victoria
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Bayswater
Take District Line to Barons Court
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Mile End
Take District Line to Cannon Street
Take Circle Line to Moorgate
Take Circle Line to Hammersmith
Take Circle Line to Cannon Street
Take Circle Line to Hammersmith
Take Circle Line to Cannon Street
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Mile End
Take District Line to Barking
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Bank
Take Northern Line to Charing Cross
Take Northern Line to Charing Cross
Take Bakerloo Line to Paddington
Take Circle Line to Royal Oak
Take Circle Line to Tower Hill
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Bank
Take Circle Line to Baker Street
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Baker Street
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Liverpool Street
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Bank
Take District Line to Gunnersbury
Take District Line to Upminster
Take District Line to East Ham
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Sloane Square
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take Circle Line to Cannon Street
Take District Line to Gunnersbury
Take District Line to Mile End
Take District Line to East Ham
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Plaistow
Take District Line to Mile End
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take District Line to Barking
Take District Line to Bank
Take District Line to Barking
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Wood Lane
Take Circle Line to Liverpool Street
Take Circle Line to Bank
Take Circle Line to Liverpool Street
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take District Line to Barking
Take District Line to Bank
Take District Line to Barking
Take District Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Dagenham East
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Victoria
Take Circle Line to Bank
Take Circle Line to Victoria
Take Circle Line to Hammersmith
Take District Line to Mile End
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Upminster
Take District Line to Mile End
Take Central Line to Bank
Take Circle Line to Victoria
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take District Line to Elm Park
Take District Line to Bank
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Bank
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Bank
Take Central Line to Northolt
Take Central Line to Bank
Take Circle Line to Bank
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Barons Court
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Wimbledon
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Tower Hill
Take Circle Line to Bank
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Mile End
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Baker Street
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Bakerloo Line to Waterloo
Take Northern Line to Bank
Take Circle Line to Bank
Take Central Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Blackfriars
Take Circle Line to Bank
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Paddington
Take Circle Line to Bank
Take Circle Line to Victoria
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Victoria
Take Circle Line to Wood Lane
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take Circle Line to Paddington
Take Circle Line to Victoria
Take Circle Line to Victoria
Take Victoria Line to Euston
Take Victoria Line to Victoria
Take Circle Line to Victoria
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Wood Lane
Take Circle Line to Paddington
Take Circle Line to Bank
Take Central Line to Northolt
Take Central Line to Bank
Take District Line to Southfields
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Baker Street
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Upminster
Take District Line to Ravenscourt Park
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Mile End
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take District Line to Upminster
Take District Line to Mile End
Take Central Line to Bank
Take Circle Line to Bank
Take Northern Line to Old Street
Take Northern Line to Bank
Take Circle Line to Bank
Take District Line to Gunnersbury
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take District Line to Mile End
Take Central Line to Theydon Bois
Take Central Line to Mile End
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Bank
Take Northern Line to Old Street
Take Northern Line to Bank
Take Circle Line to Bank
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Acton Town
Take Piccadilly Line to Cockfosters
Take Piccadilly Line to Acton Town
Take District Line to Acton Town
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Wood Lane
Take Circle Line to Paddington
Take Circle Line to Wood Lane
Take Circle Line to Bank
Take District Line to Elm Park
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bayswater
Take Circle Line to Paddington
Take Circle Line to Bayswater
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bayswater
Take Circle Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bayswater
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bayswater
Take District Line to Barking
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Barbican
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Barbican
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to East Ham
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take District Line to Elm Park
Take District Line to Bank
Take Central Line to Chancery Lane
Take Central Line to Bank
Take Circle Line to Bank
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Bank
Take District Line to Plaistow
Take District Line to Bank
Take Circle Line to Hammersmith
Take District Line to Mile End
Take Central Line to Bank
Take Circle Line to Bank
Take Circle Line to Farringdon
Take Circle Line to Bank
Take Circle Line to Bank
Take Central Line to Mile End
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Bank
Take Northern Line to Brent Cross
Take Northern Line to Bank
Take Circle Line to Bank
Take Central Line to Mile End
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take Circle Line to Notting Hill Gate
Take Circle Line to Notting Hill Gate
Take District Line to Upminster
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Farringdon
Take Circle Line to Bank
Take Circle Line to Tower Hill
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Farringdon
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Farringdon
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Southfields
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take District Line to Elm Park
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to Elm Park
Take District Line to Paddington
Take Circle Line to Blackfriars
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Royal Oak
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to Barons Court
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Blackfriars
Take Circle Line to Paddington
Take Circle Line to Blackfriars
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Royal Oak
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Farringdon
Take Circle Line to Paddington
Take Circle Line to Paddington
Take District Line to Southfields
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Embankment
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to East Ham
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take District Line to East Ham
Take District Line to Bank
Take District Line to Barking
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Barbican
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to West Ham
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take District Line to Barons Court
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Victoria
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Wood Lane
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Aldgate
Take Circle Line to Paddington
Take Circle Line to Aldgate
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take District Line to Barking
Take District Line to Paddington
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to Barking
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Moorgate
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Central Line to Chancery Lane
Take Central Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take District Line to Barking
Take District Line to Paddington
Take Circle Line to Westminster
Take Circle Line to Paddington
Take District Line to Plaistow
Take District Line to Bank
Take Circle Line to Moorgate
Take Circle Line to Hammersmith
Take Circle Line to Bank
Take Northern Line to Charing Cross
Take Northern Line to Charing Cross
Take Northern Line to Bank
Take Circle Line to Bank
Take Circle Line to Paddington
Take Circle Line to Westminster
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take Circle Line to Aldgate
Take Circle Line to Temple
Take Circle Line to Hammersmith
Take District Line to Mile End
Take Central Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Bank
Take Circle Line to Westminster
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Mile End
Take Central Line to Bank
Take Circle Line to Bank
Take Northern Line to Charing Cross
Take Northern Line to Charing Cross
Take Northern Line to Bank
Take Circle Line to Tower Hill
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take Circle Line to Notting Hill Gate
Take Circle Line to Notting Hill Gate
Take District Line to Upminster
Take District Line to Tower Hill
Take Circle Line to Bank
Take Circle Line to Temple
Take Circle Line to Bank
Take Circle Line to Bayswater
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Bayswater
Take Circle Line to Tower Hill
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take Circle Line to Notting Hill Gate
Take Circle Line to Notting Hill Gate
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Embankment
Take Circle Line to Hammersmith
Take Circle Line to Tower Hill
Take Circle Line to Bank
Take Circle Line to Embankment
Take Northern Line to Angel
Take Northern Line to Bank
Take Central Line to Marble Arch
Take Central Line to Bank
Take Circle Line to Bank
Take Circle Line to Westminster
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Mile End
Take Central Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Mile End
Take Central Line to Bank
Take Circle Line to Bank
Take Northern Line to Charing Cross
Take Northern Line to Charing Cross
Take Northern Line to Bank
Take Circle Line to Tower Hill
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take Circle Line to Notting Hill Gate
Take Circle Line to Notting Hill Gate
Take District Line to Upminster
Take District Line to Embankment
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Piccadilly Line to Bounds Green
Take Piccadilly Line to Hammersmith
Take Circle Line to Embankment
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Cannon Street
Take Circle Line to Hammersmith
Take Circle Line to Cannon Street
Take District Line to Acton Town
Take District Line to Acton Town
Take Piccadilly Line to Bounds Green
Take Piccadilly Line to Holborn
Take Central Line to Holborn
Take Central Line to Bank
Take Circle Line to Hammersmith
Take District Line to West Ham
Take District Line to Bank
Take Circle Line to Aldgate
Take Circle Line to Aldgate
Take Metropolitan Line to Chalfont & Latimer
Take Metropolitan Line to King's Cross St. Pancras
Take Victoria Line to Seven Sisters
Take Victoria Line to Euston
Take Victoria Line to Euston
Take Northern Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Tower Hill
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Stepney Green
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Stepney Green
Take Hammersmith & City Line to Moorgate
Take Circle Line to Moorgate
Take Metropolitan Line to Chalfont & Latimer
Take Metropolitan Line to Moorgate
Take Circle Line to Moorgate
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Upminster
Take District Line to Bank
Take Circle Line to Tower Hill
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take Piccadilly Line to Russell Square
Take Piccadilly Line to Russell Square
Take Piccadilly Line to Acton Town
Take District Line to Acton Town
Take District Line to Bank
Take Circle Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Bank
Take District Line to East Ham
Take District Line to Bank
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take District Line to East Ham
Take District Line to Tower Hill
Take Circle Line to Bank
Take District Line to West Ham
Take District Line to Bank
Take Circle Line to Bank
Take Northern Line to Angel
Take Northern Line to Bank
Take Circle Line to Moorgate
Take Circle Line to Bank
Take Circle Line to Hammersmith
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Bank
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Barbican
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Moorgate
Take Circle Line to Bank
Take Northern Line to Morden
Take Northern Line to Bank
Take Circle Line to Bank
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Victoria
Take Victoria Line to Seven Sisters
Take Victoria Line to Victoria
Take Circle Line to Victoria
Take District Line to Mile End
Take District Line to Embankment
Take Northern Line to Kennington
Take Northern Line to Bank
Take Circle Line to Bank
Take Central Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Liverpool Street
Take Circle Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Aldgate
Take Metropolitan Line to Croxley
Take Metropolitan Line to Aldgate
Take Circle Line to Aldgate
Take Circle Line to Bank
Take Circle Line to Bank
Take District Line to Gunnersbury
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Hammersmith
Take District Line to Gunnersbury
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to West Brompton
Take District Line to Gunnersbury
Take District Line to Mile End
Take District Line to Acton Town
Take District Line to Mile End
Take District Line to Paddington
Take Circle Line to Paddington
Take Circle Line to Victoria
Take Victoria Line to Seven Sisters
Take Victoria Line to Victoria
Take Circle Line to Victoria
Take District Line to Mile End
Take District Line to Acton Town
Take District Line to Acton Town
Take Piccadilly Line to Hounslow Central
Take Piccadilly Line to Acton Town
Take District Line to Acton Town
Take District Line to Mile End
Take District Line to Gunnersbury
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Gunnersbury
Take District Line to Paddington
Take Circle Line to Bank
Take Circle Line to Bank
Take Northern Line to Mornington Crescent

Try it online!

Explanation

First, a quick refresher on Mornington Crescent:

• each station can either hold a string of arbitrary length or a bigint
• there's also an accumulator which also holds a string or a bigint
• all stations start with their own name as their value
• at the beginning, the accumulator contains your program's input
• each time you go to a station, the station's value and the accumulator are swapped
• some stations are special and override this behavior
• the line you use to get to a station doesn't matter
• you start at Mornington Crescent
• to end the program, you go to Mornington Crescent too
• at the end, the value of the accumulator is printed

Since printing strings is hard (see Martin Ender's Mornington Crescent "Hello, World!" program), we will need a simple template that can be used to output generic strings. Since the length of the generated programs don't matter, I've settled on this:

Take Northern Line to Bank
Take Northern Line to Bank
Take District Line to Paddington

We'll need to generate each character separately and concatenate them, since the substring approach used by Martin is much harder to implement in the general case. Paddington is the station that performs string concatenation. When you arrive at Paddington, the following happens:

accumulator, paddington = paddington + accumulator, accumulator

This behavior is used to initialize Paddington to the empty string that's assumed to be the input.

Take District Line to Victoria
Take Victoria Line to Seven Sisters
Take Victoria Line to Euston
Take Victoria Line to Euston
Take Northern Line to Bank

Go to Seven Sisters, which sets the accumulator to 7, and store it in the Bank. The Bank is the only way to copy values - Hammersmith is a readonly copy of Bank's value.

Take District Line to Hammersmith
Take District Line to Cannon Street
Take District Line to Hammersmith
Take District Line to Cannon Street
Take District Line to Bank

Divide 7 by 7 to get 1, a divisor of all ASCII values we need to support.

Take District Line to Hammersmith
Take District Line to Upminster

For each character, start by copying the 1 to Upminster.

Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster
Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Upminster

Add more ones as necessary.

Take District Line to Hammersmith
Take District Line to Upminster
Take District Line to Bank
Take District Line to Bank
Take Northern Line to Charing Cross
Take Northern Line to Charing Cross
Take Bakerloo Line to Paddington
Take Bakerloo Line to Paddington
Take Bakerloo Line to Charing Cross
Take Northern Line to Embankment

Finish up by going to Upminster only once, to keep the new value in the accumulator instead of storing it again. Take it to Charing Cross to turn the ASCII value into a character and append it to the string. The last two lines are there because I've misread the specification, so I'll stop here and golf my program down first.

Answer 4

Jelly, 1 byte

Ṿ

Woo builtins!

The builtin Ṿ unevals the input.

Try it online!

A more interesting one:

⁾“”j

Joins the string "“”" by the input.

Try it online!

Answer 5

Charcoal, 1 byte

θ

By default, a string of ASCII characters .. ~ simply prints itself, so it just remains to print the input.

Answer 6

C (gcc), 89 87 58 56 bytes

Saved two bytes thanks to Jakob!

main(a,c)char**c;{printf("main(){puts(\"%s\");}",c[1]);}

Try it online!

Answer 7

Japt, 2 bytes

iQ

Try it online!

i is a function that inserts a specified string at a specified index into the input. Q is a variable that defaults to a quotation mark ", and since there's no index given, this defaults to 0. The end result is a quotation mark inserted at the beginning of the string, which Japt auto-finishes when running.

This works on strings containing anything except ", {, or \, though of course the string is guaranteed to consist of alphanumeric chars so this doesn't matter.

Answer 8

Python 2, 22 bytes

print'print%r'%input()

Try it online!

Answer 9

MATLAB / Octave, 15 bytes

@(t)['disp ',t]

Try it online!

I completely overlooked the fact that the program only needs to handle alphanumeric characters, or, importantly, does not need to handle space characters. This means we can use the 'command' syntax, which uses significantly less bytes.

MATLAB, 27 bytes

For completeness, here's a version that can handle arbitrary input:

@(t)['disp(',mat2str(t),41]

Defines an anonymous function taking the string t, and converts it to the program. Curiously, this does not work in Octave, which seems to have different ideas of what mat2str should do.

Answer 10

Befunge-98 (FBBI), 21 16 12 bytes

-5 bytes thanks to NieDzejkob
-4 bytes thanks to Jo King

#,~'',,',,'@

Try it online!

Outputs 't,'e,'s,'t,@ for an input of test

How?

Initially the pointer moves East:

#,           # skips the next instruction
  ~          push a byte of input
   '',       push ' and print it
      ,      print the byte of input
       ',,   push , and print it 
          '@ push @ to the stack

If there is no more input left, ~ reverses the direction of the pointer:

 ,           print @
#            skip nothing
           @ terminate

Answer 11

Emojicode, 88 bytes

➡️❌❌

Try it online!

Input:

anyString

Output:

anyString

Script Output:

anyString

Answer 12

QBIC, 7 bytes

?@?@`+;

Explanation

?           PRINT on the screen
 @  `       a literal
  ?@         question mark and at
     +;     and append the input

Sample run

Command line: lala
?@lala

The output is a string literal containing the input, preceded with a PRINT command.

Answer 13

Batch 11 bytes

I'm sure there's away to get it smaller, but this is pretty small.

set/p=echo 

The breakdown:

set             ::Define new variable
   /p           ::Create prompt
     =          ::Define a variable in prompt
      echo      ::Prompt begins with 'echo '

In English:

The user is asked for input with a leading phrase echo. Then the user may type in whatever, and the program terminates (e.g; echo hello world!). This leaves us with a program that when ran, will output hello world!.

Yes, the whitespace is supposed to be there

Answer 14

D, 92 89 bytes

void main(){import std.stdio;write(`void main(){import std.stdio;"`~readln~`".write;}`);}

Try it online!

Answer 15

V, 2 bytes

ii

In Vim, i changes to insert mode and allows inserting text. In this case, it just inserts the i in front of the input text (to create the second program). V is Vim compatible, but adds an implicit <esc> to the end of the program, so I don't need to worry about it here.

Answer 16

PowerShell, 9 Bytes

"'$args'"

single or double quotes in powershell can be used to contain strings, but only double-quotes allow variable expansion.

with an input of foo this will output 'foo' which is a valid powershell program which outputs foo

Answer 17

Cubically, 87 bytes

U3D1R3L1F3B1U1D3~:7+1(-1@3(-1%1)6:1+3111@6%1-31111+004@6:1+11111%6:1+45@6:1-1%6~:7+1)6 

Try it online!

A port of my answer here. There already existed a challenge to take input and output Cubically code that produced that input, and I had an answer in Cubically so... profit?

Answer 18

Python 2, 17 bytes

'print%r'.__mod__

Try it online!

Answer 19

Pyth, 2 1 byte

z

Try it online!

Just outputs the input. Requires strings to be in quotes.

-1 byte thanks to KarlKastor

Answer 20

SOGL V0.12, 2 bytes

$+

Try it Here! (expects input on stack so , is added for ease-of-use)

$ pushes ”, + joins that after the input on the stack.

Answer 21

Perl 6, 19 bytes

say "say "~get.perl

Try it

This should work for any Unicode input in NFC

Answer 22

8th, 34 37 bytes

Code

: f >s "\"" tuck s:+ s:+ " ." s:+ . ;

Example

ok> "Print 42" f
"Print 42" .
ok> "Print 42" .
Print 42

Answer 23

PHP, 12 bytes

<?=$argv[1];

Try it online!

This is to be run from the command line with the input as the parameter argument. And yes, it simply outputs the input string—but that is valid PHP: anything outside the <?php ?> delimiters is output unprocessed.

Here is the script produced by the 'testing123' input in action as a demonstration: Try it online!

Answer 24

Haskell, 2 bytes

id

id returns it's argument unchanged.

id "abc" returns "abc" which evaluates to itself, which is a valid output method according to or standard rules. id is polymorphic and works for all kind of input types, so it also works for integer inputs.

The challenge requires to "output a piece of code". As @TannerSwett point out in a comment, the output of id is not valid Haskell source code, but a Haskell value or function that can be evaluated further, so it might also qualify as "code". If "code" means "source code" then we have a 4 byte answer

Haskell, 4 bytes (outputs source code)

show

Answer 25

MATL, 2 bytes

&D

Try it online!

Simply wraps the string in quotes using &D, which is MATL's equivalent to MATLAB's mat2str, a function specifically made to make something that, when eval'd, will give the original matrix (or in this case, string).

The resulting 'program' is just the input string wrapped in quotes, which is thus pushed on the stack, and implicitly displayed.

Answer 26

Java 8, 16 bytes

A rather strange challenge, especially given that the solution is only required to support alphanumeric strings.

s->"v->\""+s+'"'

This is a lambda from a string to the string representation of a lambda taking an empty argument of any type and returning the string.

Answer 27

Batch, 14 bytes

@echo @echo(%*

Works for special characters too if they are quoted using "s rather than ^.

Answer 28

eacal, 38 bytes

strap string put string 
put strap arg

Try it online!

Simply appends the string put string to the memory string, then appends the argument, which is printed.

Answer 29

Ly, 14 bytes

"\""&i"\"&o"&o

Try it online!

Explanation

"\""&i"\"&o"&o

"\""           # push `"`
    &i         # take input
      "\"&o"   # push `"&o`
            &o # output stack
               # test -> "test"&o
               # "test"&o = push "test" and output stack

Answer 30

05AB1E, 3 bytes

'"«

Try it online!

---

Surround input with quotes.

-1 @Adnan.

Answer 31

Bash, 10 bytes

^{Saved 2 bytes thanks to @manatwork!}

echo{,} $1

Try it online!

Answer 32

R (+ pryr), 27 25 bytes

pryr::f(function()cat(x))

which evaluates to the function:

function (x) 
function() cat(x)

which returns the function:

function()cat(x)

where x is defined in the scope of the first function, and taken directly from its input.

Answer 33

Carrot, 1 byte

#

How it works

# //Takes the input and places it onto the string stack
  //This is then output implicitly

{input} //The next program then consists of the input string
        //This is then placed directly onto the string stack
        //Then output implicitly

An alternative, also at 1 byte is:

$

This works the same as the above but only takes the first line of input. Seeing as input will only ever be [A-Za-z0-9] this is fine.

Answer 34

Brain-Flak, 92 68 bytes

-22 bytes thanks to Wheat Wizard

Includes +2 for -cr

{<>(((((()()()()()){}){}){})())<>{({}[()])<>((({}[()])()))<>}{}}<>

Try it online!

# For every character
{

   # Put ")(" on the off stack
   <>(((((()()()()()){}){}){})())<>

   # for 0 to the ASCII value of this character
   {({}[()])

      # Replace the ")" with "(" and add "))"
      <>((({}[()])()))<>

   # End for
   }{}

# end for and switch to the off stack for printing (in reverse order because of -r)
}<>

Answer 35

QBasic, 25 23 bytes

INPUT s$
?"?";
WRITE s$

Gets input from the user, and then prints a question mark followed by the input wrapped in double quotes. (Question mark is a shortcut for PRINT.)

Answer 36

SmileBASIC, 21 bytes

Maybe this is cheating...

LINPUT"?"+CHR$(34);S$

Asks for input with the prompt ?". (? is short for PRINT, and closing quotes are not required). So the "output" program is ?"<text>

Answer 37

><>, 29 bytes

/->:?v";"o;
/l^  >"o''"o{ooo1

Takes input using the -s flag Prints a program that reads and print the original input character by character.

input -> 'i'o'n'o'p'o'u'o't'o;

Answer 38

Lua, 31 bytes

print('print([['..(...)..']])')

Try it online!

Answer 39

Julia 0.6, 8 bytes

s->()->s

Try it online!

Function that takes a string, and returns a closure that returns the string when called.

Alternately, a program outputting a program:

Julia 0.6, 28 26 bytes

print(:(show($(ARGS[1]))))

Try it online!

(Removed, of all things, a trailing whitespace. Smh. Also changed inner print to show.)

Answer 40

R, 41 37 characters

function(x)"[[<-"(sys.call(),1,"cat")

How it works:

sys.call (makes only sense if used from within a function) returns the call; the first element of it is the name of the function; this is replaced on-the-fly by cat (which will print its arguments).

A nicer version:

sqk <- function(x)"[[<-"(sys.call(),1,as.name("cat"))
# will print cat(args) instead of "cat"(args) - both are functional but the 2nd is nicer

Example with output:

> sqk("The paws")
cat("The paws")

Answer 41

Proton, 15 bytes

'print(%r)'&(%)

Try it online!

Binds 'print(%r)' to the left argument of % string formatting. When the input is given, it is applied as the second (right) argument which formats into the print statement.

Answer 42

Pyth, 3 bytes

+Nz

Try it online!

Explaination:

+Nz   expects any input
+     joins on same line
 N    quotation mark
  z   input as string

Answer 43

JavaScript ES6, 25 bytes (outputs code to "standard output")

s=>alert(`alert('${s}')`)

JavaScript ES6, 23 bytes (returns code, that outputs to "standard output")

s=>`alert('${s}')`

JavaScript ES6, 14 bytes (returns a function, that returns the result)

s=>`_=>"${s}"`

Answer 44

Lua, 30 bytes

print("print(\"".. ....."\")")

Try it online!

Answer 45

Mathematica, 15 bytes

"\""<>#<>"\"&"&

Not much.

Answer 46

Mathematica, 14 bytes

Defer@Print@#&

For input "test", this function will output Print["test"], which prints "test" when run.

Answer 47

Rexx (Regina), 14 bytes

say say arg(1)

Try it online!

Answer 48

C++, 125 bytes

Warning : the code that will be printed will be invalid if input contains at least one of the character "

#include<iostream>
int main(int a,char**v){std::cout<<"#include<iostream>\nint main(){std::cout<<\""<<(a>1?v[1]:"")<<"\";}";}

C++, 116 bytes, undefined behavior if nothing is passed as console argument

If empty strings are considered as invalid input :

#include<iostream>
int main(int a,char**v){std::cout<<"#include<iostream>\nint main(){std::cout<<\""<<v[1]<<"\";}";}

Answer 49

Retina, 5 bytes

\`^
¶

Try it online!

For an input like testing123 returns the program:

testing123

which in turn produces the desired output.

Try it online!

There might be a trick to disable the newline append with shorter syntax, but I don't know it!

Answer 50

C#, 16 bytes

s=>$"()=>\"{s}\""

Answer 51

Common Lisp, 13 bytes

`,(read-line)

Try it online!

For instance, given the input john, the output will be "john", which evaluates to itself.

For a program that works through printing and not through the REPL:

Common Lisp, 20 bytes

`(princ,(read-line))

that produces (princ input-string).

Answer 52

><>, 37 bytes

i:1+?!v
-1"#"~<.1fo;!?l"<.09o;!?l"r}:

Try it online!

Fairly simple;

Takes input, prints out a printing loop with the string attached to the end.

Answer 53

Swift, 47 bytes

print("print(\"\(CommandLine.arguments[1])\")")

I think this is pretty straight forward.

Answer 54

CJam, 2 bytes

q`

Explanation:

q  e# Input
`  e# String representation

Answer 55

Befunge-98 (PyFunge), 30 bytes

'":v
~\#[
<v">:#,_""#
<>4k,'@,

Try it online!

This prints a program in the form "...ihgfedcba">:#,_@, which prints abcdefghi...

Explanation

The code boils down to:

'":v    Push 2 quotation marks

~\#[    Get input and swap the top 2 items until EOF.
            Because every time we put a new value from input on the stack we also swap,
            the second quotation mark will float to the top, surrounding the input.

   >:#,_       A standard "print until the top is 0" loop
        ""#    Pushes a space, which is fine, since we control how much we print later
<v">:#,_"      When the IP gets reversed, we actually push the loop backwards onto
               the stack. This lets us print it later, instead of having to hardcode it.

 >4k,'@,       Prints 5 characters, being the printing loop from before, along with a @
<     @,       Prints an extra space, but it doesn't matter, and ends the program

Answer 56

J, 12 bytes

'echo',quote

Try it online!

Answer 57

Ruby -n, 12 bytes

$><<"p'#$_'"

Try it online!

Answer 58

Aceto, 14 13 11 bytes

'"drsJJp'pp

Try it online!

'"       push a quote character
  d       duplicate
   r       get input
    s       swap top stack items, so the input is between the two quotes
     JJ      Join top two items, 2x
       p  p    print
        'p      push literal:p 

Answer 59

Javascript, 20 bytes

Uses eval to make a new function from the input string.

a=>eval(`a=>'${a}'`)

Answer 60

Julia 0.6, 18 bytes

x->"print(\"$x\")"

Try it online!

Answer 61

AWK, 25 bytes

$0="BEGIN{print\""$0"\"}"

Try it online!

Should work for most input other than ".

If some (possibly empty) input is allowed for the secondary program this could be shortened to:

$0="$0=\""$0"\""

Answer 62

dc, 10 bytes

91Pn93PACP

Try it online!

Straightforward: print an open bracket, then the input, then the close bracket and the letter p for the print command. 91Pn23920P also works.

Answer 63

WinDbg, 14 bytes

.echo.echo $u0

Input is taken by setting the fixed name alias $u0 (so that input can be either a string or number).

Running this will print:

.echo {value_of_$u0}

Which when executed prints the input.

Example:

$$ set input
r$.u0=testing123

$$ run code
.echo.echo $u0
$$output: .echo testing123

$$ run output
.echo testing123
$$output: testing123

How it works:

.echo            $$ print the rest of the statement
     .echo       $$ part of the string that gets printed
           $u0   $$ automatically expands to the value of the fixed name alias,
                 $$ the expanded alias is printed
                 $$ because only a-zA-Z0-9 needs to be handled, no special logic around the
                 $$ alias expansion with regard to spaces, ", or ; interfering with the
                 $$ next .echo needs to be done

How the output works:

.echo            $$ print the rest of the statement
      {string}   $$ the string that gets printed, guaranteed to be one statement because
                 $$ it can't contain ; or " and can't start with a space

Answer 64

T-SQL, 28 bytes

SELECT'PRINT'''+s+''''FROM t

An input table is allowed per our IO rules, so I simply create a PRINT statement with the appropriate quotation marks.

An input of FooBarBaz109481 in the input table t will result in the following output:

PRINT'FooBarBaz109481'

Which will output the original string.

The original question says the string will only contain alphanumerics, so we won't have to handle any quote marks in the input itself.

Answer 65

JavaScript (Node.js), 49 bytes

console.log('console.log("'+process.argv[2]+'")')

Try it online!

Takes input through argv[2], the first argument in TIO (May be different depending on where it is tested), and prints in the console.log("YOUR_MESSAGE") format. Requires a string without quotes (unless escaped with \) with available characters A-Z, a-z, and 0-9.

Explanation

console.log(           // Log the output (open the outer log statement)
  'console.log("'      // Take console.log with opening parenthesis and quote
    + process.argv[2]  // Add the command-line argument after the quote (the input)
    + '")'             // Add the closing quote and parenthesis
)                      // Close the outer log statement

Answer 66

R, 5 4 1 0 bytes

Thanks to JayCe for contributing the one-byte answer!

There are a number of short R programs that would ...

take a string as input, and output a piece of code in the same language that, when run, will output the initial input string

. Some of these are listed below, one on each row, in descending order of length:

identity     # 8 bytes
force        # 5 bytes
print
eval         # 4 bytes
c            # 1 byte
             # 0 bytes

This is inspired by NoOneIsHere's 1-byte answer in Pyth which is said to "just evaluate the input". This is exactly what force and identity do. eval and c achieve the same result in different ways. But why stop here? When you feed a string into R, it will be evaluated (to itself) and printed in quotes. A quoted string is a valid R program. That's the idea of the 0-byte answer.

Uniquely, the same program works identically in R and Python:

R way

> "yo ho ho and a bottle of rum"
[1] "yo ho ho and a bottle of rum"

Python way

>>> 'yo ho ho and a bottle of rum'
'yo ho ho and a bottle of rum'

Answer 67

R, 34 bytes

cat("cat(",scan(,""),")",sep="\"")

Try it online!

Non-functional answer - longer than the functional one

Answer 68

Excel VBA, 10 bytes

An anonymous function that outputs an anonymous function that prints the value of cell A1.

?"?"""[A1]

Example I/O

Given that cell [A1] that is populated with One

?"?"""[A1]
?"One
One

Answer 69

Yabasic, 22 bytes

An anonymous function that takes input, S$ as a string and outputs a function that outputs S$ to the console.

This relies on the fact that the Input Call will print a ? character to the console as a prompt when no explicit prompt is provided

Input S$
?"\""+S$+"\""

Try it online!

Answer 70

Lua, 29 bytes

print('print("'.. ... ..'")')

Try it online!

Answer 71

Scala, 79 bytes

println(s"""object x{def main(a:Array[String])=println("${args.mkString}")}""")

Try it online!

Answer 72

JavaScript Firefox, 6 bytes

uneval