7, 23 characters, 9 bytes
54340045141332401057403
Try it online!
This is a fairly hard challenge in a language that consists entirely of digits, but I managed it…
This is just 9 bytes in 7's encoding. (Strictly speaking, it's 8⅜ bytes (23 × ⅜ − ¼ because the final two trailing 1 bits can be omitted), but for the first time, PPCG's requirement to round up to a whole number of bytes is actually an advantage because it means that the extra trailing 1 bits are necessary and thus not banned by the question.) A reversible hex dump:
00000000: b1c0 2530 b6a0 22f8 1f ..%0.."..
The main challenge of writing this program in 7 was golfing it to under 10 bytes (as writing 7 without using 0 or 1 is pretty hard.) This uses the same structure as the standard "Hello world" program:
54340045141332401057403
5434004514133240105 commands 0-5 append literals to data space
7 start a new section of data space
403 another literal appended to data space
{implicit: eval the last section as commands}
4 swap 1st and 2nd sections with an empty section between
6 reconstruct the commands that would create the 1st section
3 output (+ some other effects we don't care about)
In other words, we start by creating two sections of the data space; we have two literals, each of which pushes a sequence of commands there. The second section (they're pushed stack-style so first push = last pop) is a fairly arbitrary sequence of commands but is pushed using the command sequence 5434004514133240105 (thus producing the data sequence 5434664574733246765; when discussing 7 in text, I normally use normal font for a command that pushes a literal, and bold for the corresponding resulting literal). The first section is pushed using the command sequence 403, producing 463. Then the first section is copied back to the program (an implicit behaviour of 7).
The 463 is now composed of (bold) commands that do something immediately, rather than (non-bold) commands that just push literals. 4 rearranges the sections to get our "string literal" into the first section. Then 0 does the operation that 7 is most known for: taking a section of data space, and reconstructing the command sequence that's most likely to have created it. In the case where the original command sequence was all 0-5, this is 100% accurate (unsurprisingly, as those commands purely push data and thus leave obvious evidence of what they did), and so we get our original sequence 5434004514133240105 back. Finally, 3 prints it.
So the remaining thing to look at here is the encoding of the string. This has its own domain-specific language:
5434004514133240105
5 change encoding: 6 bits per character
43 select character set: digits and common symbols
40 '9'
04 space
51 select character set: uppercase letters
4133240105 'B' 'Y' 'T' 'E' 'S'
(There's no "select character set: lowercase letters" in the "digits and common symbols" character set – you have to go via a different character set first – so I needed to use uppercase to golf this short enough to fit underneath the effective 10-byte limit.)
6Does this need the [tag:quine] tag, or may the code self-inspect? – Adám – 2018-03-29T15:59:46.263
Pardon me for asking, but what is a
trailing byte(I'm sorta new ). – Dat – 2018-03-29T16:14:08.6173@Dat, given the formatting of the word
bytesI suspect the intention is that the count should include the bytes it takes to print the text:bytes– Jeff Schaller – 2018-03-29T16:16:30.0502Are leading spaces in output acceptable? – rafa11111 – 2018-03-29T17:43:55.807
3If my code is 1 byte long, should I output
1 bytesor1 byte? (keep in mind there are already 41 answers, although I don't think any are affected) – Erik the Outgolfer – 2018-03-29T18:07:33.183@X1M4L Also, I don't recommend code to be able to self-inspect, this would easily make a generalized quine challenge if not for that. – Erik the Outgolfer – 2018-03-29T18:11:41.940
Can
bytesbe uppercase? – Jo King – 2018-03-29T22:44:49.9001@JoKing well I didn’t address casing in the rules, but if somehow using capital letters makes your score lower, then by all means I’d love to see what you came up with. I say go for it! – X1M4L – 2018-03-29T22:50:34.283
@X1M4L i can imagine that in some programming languages (mostly very ancient ones) there are no lowercase characters in a character set. In this case however, it's just to make Brainfuck code more compact which seems fair. – Konrad Borowski – 2018-03-30T12:44:41.720
Can the output be surrounded by quotes? – Reinstate Monica -- notmaynard – 2018-03-30T13:54:28.360
@iamnotmaynard im sorry but output is limited to numerical byte count, the word
bytes, and white-space characters – X1M4L – 2018-03-30T15:51:26.540As rafa11111 asked earlier: Are leading spaces acceptable? – Stewie Griffin – 2018-04-01T15:31:15.830
@StewieGriffin - I you read the question only trailing whitespaces seems to be allowed. – Cyclonecode – 2018-04-04T08:48:42.373
Can
bytesbe in any case pattern, e.g.bYtEs? – Hello Goodbye – 2019-12-27T14:56:19.283@HelloGoodbye sure – X1M4L – 2019-12-31T07:32:25.547