Simple cat program

Question

One of the most common standard tasks (especially when showcasing esoteric programming languages) is to implement a "cat program": read all of STDIN and print it to STDOUT. While this is named after the Unix shell utility cat it is of course much less powerful than the real thing, which is normally used to print (and concatenate) several files read from disc.

Task

You should write a full program which reads the contents of the standard input stream and writes them verbatim to the standard output stream. If and only if your language does not support standard input and/or output streams (as understood in most languages), you may instead take these terms to mean their closest equivalent in your language (e.g. JavaScript's prompt and alert). These are the only admissible forms of I/O, as any other interface would largely change the nature of the task and make answers much less comparable.

The output should contain exactly the input and nothing else. The only exception to this rule is constant output of your language's interpreter that cannot be suppressed, such as a greeting, ANSI color codes or indentation. This also applies to trailing newlines. If the input does not contain a trailing newline, the output shouldn't include one either! (The only exception being if your language absolutely always prints a trailing newline after execution.)

Output to the standard error stream is ignored, so long as the standard output stream contains the expected output. In particular, this means your program can terminate with an error upon hitting the end of the stream (EOF), provided that doesn't pollute the standard output stream. If you do this, I encourage you to add an error-free version to your answer as well (for reference).

As this is intended as a challenge within each language and not between languages, there are a few language specific rules:

• If it is at all possible in your language to distinguish null bytes in the standard input stream from the EOF, your program must support null bytes like any other bytes (that is, they have to be written to the standard output stream as well).
• If it is at all possible in your language to support an arbitrary infinite input stream (i.e. if you can start printing bytes to the output before you hit EOF in the input), your program has to work correctly in this case. As an example yes | tr -d \\n | ./my_cat should print an infinite stream of ys. It is up to you how often you print and flush the standard output stream, but it must be guaranteed to happen after a finite amount of time, regardless of the stream (this means, in particular, that you cannot wait for a specific character like a linefeed before printing).

Please add a note to your answer about the exact behaviour regarding null-bytes, infinite streams, and extraneous output.

Additional rules

• This is not about finding the language with the shortest solution for this (there are some where the empty program does the trick) - this is about finding the shortest solution in every language. Therefore, no answer will be marked as accepted.

• Submissions in most languages will be scored in bytes in an appropriate preexisting encoding, usually (but not necessarily) UTF-8.

  Some languages, like Folders, are a bit tricky to score. If in doubt, please ask on Meta.

• Feel free to use a language (or language version) even if it's newer than this challenge. Languages specifically written to submit a 0-byte answer to this challenge are fair game but not particularly interesting.

  Note that there must be an interpreter so the submission can be tested. It is allowed (and even encouraged) to write this interpreter yourself for a previously unimplemented language.

  Also note that languages do have to fulfill our usual criteria for programming languages.

• If your language of choice is a trivial variant of another (potentially more popular) language which already has an answer (think BASIC or SQL dialects, Unix shells or trivial Brainfuck derivatives like Headsecks or Unary), consider adding a note to the existing answer that the same or a very similar solution is also the shortest in the other language.

• Unless they have been overruled earlier, all standard code-golf rules apply, including the loopholes that are forbidden by default.

As a side note, please don't downvote boring (but valid) answers in languages where there is not much to golf; these are still useful to this question as it tries to compile a catalogue as complete as possible. However, do primarily upvote answers in languages where the author actually had to put effort into golfing the code.

Catalogue

The Stack Snippet at the bottom of this post generates the catalogue from the answers a) as a list of shortest solution per language and b) as an overall leaderboard.

To make sure that your answer shows up, please start your answer with a headline, using the following Markdown template:

## Language Name, N bytes

where N is the size of your submission. If you improve your score, you can keep old scores in the headline, by striking them through. For instance:

## Ruby, <s>104</s> <s>101</s> 96 bytes

If there you want to include multiple numbers in your header (e.g. because your score is the sum of two files or you want to list interpreter flag penalties separately), make sure that the actual score is the last number in the header:

## Perl, 43 + 2 (-p flag) = 45 bytes

You can also make the language name a link which will then show up in the snippet:

## [><>](http://esolangs.org/wiki/Fish), 121 bytes

<style>body { text-align: left !important} #answer-list { padding: 10px; width: 290px; float: left; } #language-list { padding: 10px; width: 290px; float: left; } table thead { font-weight: bold; } table td { padding: 5px; }</style><script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <link rel="stylesheet" type="text/css" href="//cdn.sstatic.net/codegolf/all.css?v=83c949450c8b"> <div id="language-list"> <h2>Shortest Solution by Language</h2> <table class="language-list"> <thead> <tr><td>Language</td><td>User</td><td>Score</td></tr> </thead> <tbody id="languages"> </tbody> </table> </div> <div id="answer-list"> <h2>Leaderboard</h2> <table class="answer-list"> <thead> <tr><td></td><td>Author</td><td>Language</td><td>Size</td></tr> </thead> <tbody id="answers"> </tbody> </table> </div> <table style="display: none"> <tbody id="answer-template"> <tr><td>{{PLACE}}</td><td>{{NAME}}</td><td>{{LANGUAGE}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr> </tbody> </table> <table style="display: none"> <tbody id="language-template"> <tr><td>{{LANGUAGE}}</td><td>{{NAME}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr> </tbody> </table><script>var QUESTION_ID = 62230; var ANSWER_FILTER = "!t)IWYnsLAZle2tQ3KqrVveCRJfxcRLe"; var COMMENT_FILTER = "!)Q2B_A2kjfAiU78X(md6BoYk"; var OVERRIDE_USER = 8478; var answers = [], answers_hash, answer_ids, answer_page = 1, more_answers = true, comment_page; function answersUrl(index) { return "//api.stackexchange.com/2.2/questions/" + QUESTION_ID + "/answers?page=" + index + "&pagesize=100&order=desc&sort=creation&site=codegolf&filter=" + ANSWER_FILTER; } function commentUrl(index, answers) { return "//api.stackexchange.com/2.2/answers/" + answers.join(';') + "/comments?page=" + index + "&pagesize=100&order=desc&sort=creation&site=codegolf&filter=" + COMMENT_FILTER; } function getAnswers() { jQuery.ajax({ url: answersUrl(answer_page++), method: "get", dataType: "jsonp", crossDomain: true, success: function (data) { answers.push.apply(answers, data.items); answers_hash = []; answer_ids = []; data.items.forEach(function(a) { a.comments = []; var id = +a.share_link.match(/\d+/); answer_ids.push(id); answers_hash[id] = a; }); if (!data.has_more) more_answers = false; comment_page = 1; getComments(); } }); } function getComments() { jQuery.ajax({ url: commentUrl(comment_page++, answer_ids), method: "get", dataType: "jsonp", crossDomain: true, success: function (data) { data.items.forEach(function(c) { if (c.owner.user_id === OVERRIDE_USER) answers_hash[c.post_id].comments.push(c); }); if (data.has_more) getComments(); else if (more_answers) getAnswers(); else process(); } }); } getAnswers(); var SCORE_REG = /<h\d>\s*([^\n,<]*(?:<(?:[^\n>]*>[^\n<]*<\/[^\n>]*>)[^\n,<]*)*),.*?(\d+)(?=[^\n\d<>]*(?:<(?:s>[^\n<>]*<\/s>|[^\n<>]+>)[^\n\d<>]*)*<\/h\d>)/; var OVERRIDE_REG = /^Override\s*header:\s*/i; function getAuthorName(a) { return a.owner.display_name; } function process() { var valid = []; answers.forEach(function(a) { var body = a.body; a.comments.forEach(function(c) { if(OVERRIDE_REG.test(c.body)) body = '<h1>' + c.body.replace(OVERRIDE_REG, '') + '</h1>'; }); var match = body.match(SCORE_REG); if (match) valid.push({ user: getAuthorName(a), size: +match[2], language: match[1], link: a.share_link, }); else console.log(body); }); valid.sort(function (a, b) { var aB = a.size, bB = b.size; return aB - bB }); var languages = {}; var place = 1; var lastSize = null; var lastPlace = 1; valid.forEach(function (a) { if (a.size != lastSize) lastPlace = place; lastSize = a.size; ++place; var answer = jQuery("#answer-template").html(); answer = answer.replace("{{PLACE}}", lastPlace + ".") .replace("{{NAME}}", a.user) .replace("{{LANGUAGE}}", a.language) .replace("{{SIZE}}", a.size) .replace("{{LINK}}", a.link); answer = jQuery(answer); jQuery("#answers").append(answer); var lang = a.language; lang = jQuery('<a>'+lang+'</a>').text(); languages[lang] = languages[lang] || {lang: a.language, lang_raw: lang.toLowerCase(42), user: a.user, size: a.size, link: a.link}; }); var langs = []; for (var lang in languages) if (languages.hasOwnProperty(lang)) langs.push(languages[lang]); langs.sort(function (a, b) { if (a.lang_raw > b.lang_raw) return 1; if (a.lang_raw < b.lang_raw) return -1; return 0; }); for (var i = 0; i < langs.length; ++i) { var language = jQuery("#language-template").html(); var lang = langs[i]; language = language.replace("{{LANGUAGE}}", lang.lang) .replace("{{NAME}}", lang.user) .replace("{{SIZE}}", lang.size) .replace("{{LINK}}", lang.link); language = jQuery(language); jQuery("#languages").append(language); } }</script>

• TheDoctor: Bash, 3 bytes: cat
• Paŭlo Ebermann: @TheDoctor I guess this would fall into the "don't use a builtin which does exactly what is needed" rule.
• Martin Ender: @PaŭloEbermann There is no such rule, and the corresponding standard loophole is no longer accepted. (In fact, there is already a sh answer using cat which also contains a shorter solution using dd.)
• sporkl: If only it used standard methods of input and output: ///, 0 bytes.
• Martin Ender: @SparklePony Except, you'd have to escape slashes and backslashes.

Answer 1

Common Lisp, 46 bytes

This is another, shorte, solution:

(loop while(setq x(read-char t()))do(princ x))

Try it online!

Note in that Common Lisp every output on standard output always produces a newline at end (due to its nature as interactive language). If the program above is run on a different output stream, the file does not contains the final newline if this is not present in the input stream.

Answer 2

!@#$%^&*()_+, 13 bytes

*!^(!_++@*!^)

Try it online!

Explanation

*!^(!_++@*!^)
* add input to top of stack
 ! duplicate
 ^ increment
 ( ) while not zero (while not EOF):
 !_++ pop incremented entry (duplicate, negate, add twice)
 @ output original input
 * add input to top of stack
 ! duplicate
 ^ increment

Answer 3

Tamsin, 12 bytes

main=any/''.

Try it online!

Answer 4

Java, 133 bytes

No external libraries for me!

interface A{static void main(String[]a)throws Exception{for(;;)if(System.in.available()>0)System.out.print((char)System.in.read());}}

Try it online!

Answer 5

@, 6 bytes

¤ōč

Explanation

¤ Forever,
 ō output the
 č character input

Answer 6

W, 0 bytes

Indeed just a boring built-in.

Pretty obvious. Execute the program like this:

python W.py code.w ['your-string']

Remember to escape non-alphanumeric characters.

• user85052: Re-forking done.

Answer 7

Ral, 18 bytes

,:1-1:+:+:+:+?.10?

Try it online!

Explanation

, Input a character n, zero if end of file is reached 
 :1-1:+:+:+:+? Jump to opcode 16 if n ≤ 0.
 If we didn't jump:
 . Output n
 10? Jump to the start
 If we did jump:
 0? Jump to the start if false (don't jump)

Answer 8

Rockstar, 37 bytes

listen to S
while S
say S
listen to S

Try it here (Code will need to be pasted in)

Answer 9

BRASCA, 0 bytes

I wasn't sure if I should post this one, but since there's a lot of 0-byters here, it should be fine, right?

Explanation

<implicit input> - Push STDIN to the stack
<implicit output> - Output the stack in reverse

Language Link

Github Repo

Answer 10

C (gcc), 39 bytes

f(c){for(;c=getchar(),c+1;putchar(c));}

Try it online!

f(c){c=getchar(),c+1?putchar(c),f():0;}

Try it online!

• jdt: 36 bytes Note that the requirements specifically ask for a Full Program :-(

Answer 11

Pxem, 13 bytes (filename) + 0 bytes (content) = 13 bytes.

• Filename (escaped unprintable): .w.o.i.c001円.+.a
• Content: empty

With comments

XX.z
.a.wXX.z # while empty || pop!=0; do
 .a.oXX.z # if !empty; then putchar pop; fi
 .a.iXX.z # push getchar (* NOTE EOF IS -1 *)
 .a.c001円.+XX.x # dup; push 1; push pop+pop
.a.aXX.z # done
.a

Try it online!

Answer 12

M4, 11 bytes, cheating.

syscmd(cat)

Try it online!

• Makonede: This isn't cheating. There are no rules that say you can't do this.

Answer 13

Duocentehexaquinquagesimal, 2 bytes

ßD

Try it online!

Answer 14

Sandwich, 10 bytes

lv<i: 
p$v

---

Sandwich is comprised of opcodes. The first character of every line is the opcode, and everything else is the arguments passed to the opcode.

Above code with comments:

lv<i: # Prompt with "i: ", read input, and assign input to variable v.
p$v # Print out value of variable v.

Answer 15

Unlambda, 9 bytes

``ci`c`@|

Try it online!

This works much the same way as https://codegolf.stackexchange.com/a/223645.

Answer 16

Numberwang, 5 bytes

24837

Try it online (with explanation)!

Answer 17

Pinecone, 70 bytes

s:String.input;r:"";i:s.len-1|i>=0|i:i-1@(g:s.sub:i,i+1;r:r+g);print:r

Explanation coming soon TM

Answer 18

Locksmith, 5 bytes

85986
8 Push input to stack
 5 6 Repeat until top of stack is zero
 9 Pop from stack to output
 8 Push input

Answer 19

Lost, 5 bytes

%@
@%

Try it online!

Lost is a 2D Language, where the position and direction of the instruction pointer is random. So from any starting point, going into any direction, the instructions are:

implicitly read the input into the stack.

% turn off "safe mode", so the program will end at the next @

@ end the program and implicitly print the contents of the stack

The ip will wrap around edges and it will ignore @ as long as the safe mode is active

Answer 20

RASEL, 3 bytes

~@,

text to make the answer be at least 30 chars otherwise I can't post it

Answer 21

Emmy, 13834 bytes

Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy Emmy 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Emmy machine:
inp out

Answer 22

GAIA, 1byte

p

Try it online!

p prints the input to the output

Alternative: 1byte

@

@ pushes input to stack (and it's printed by default)

The catch is that since the input itself doesn't support new lines, they cannot be printed.

I don't think the language supports null bytes either. For infinite sequences it works but the output will be cut with a warning at some point just for displaying reasons.

Answer 23

Thunno, 0 bytes

Attempt This Online!

Yet another golflang with implicit input/output.

Also works in Thunno 2: Attempt This Online!

• The Empty String Photographer: Do you even need to show the code if the programme is empty?
• The Thonnu: @Hippopotomonstrosesquipedalian it's not necessary but I did it anyway.

Answer 24

Desmoslang Assembly, 3 Bytes

EIO

• The Empty String Photographer: Old Mac Donald had a farm, EIEIO!

Answer 25

K (oK), 6 bytes

`0:0:`

Try it online!

Answer 26

(,), 14 Chars or \14ドル\times \log_{256}(3)\approx2.77\$ Bytes

(,,,((())),())

Terminating version: 23 Chars or 4.56 Bytes

(,,,(()),((),((()()))))

Answer 27

Swift, 45 bytes

Seriously? It's been 8 years and no one's uploaded a Swift answer?

print(CommandLine.arguments[1],terminator:"")

Try it on SwiftFiddle.

Okay, fine, I'll admit, there's nothing special about this thing.

Answer 28

[Matlab], 13 bytes

input('','s')

Answer 29

YASEPL, (削除) 12 (削除ここまで) (削除) 10 (削除ここまで) 4 bytes

i seem to have misunderstood the prompt, but heres a fixed version:

=a'~

Answer 30

ibe, 6 bytes

dsQdhQ

• dsQ gets input and sets it to Q.
• dhQ outputs Q