string.upper

Return a modified version of str where all lowercase characters have been converted to uppercase. Special characters and numbers are not affected.

ExamplePrint the user's input in all uppercase.
Read a line from the user, then print string in all uppercase.
Code
<nowiki>
print(string.upper(read()))
    </nowiki>
Output Depends on what the user wrote. For instance, if they were to enter Hello World, the string printed would be HELLO WORLD.

string.upper
Function
Syntax
string.upper(
  • str : string
)
Colon notation: str:upper()

Returns string
API string
Source Lua (source)
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