505
\$\begingroup\$

So... uh... this is a bit embarrassing. But we don't have a plain "Hello, World!" challenge yet (despite having 35 variants tagged with , and counting). While this is not the most interesting code golf in the common languages, finding the shortest solution in certain esolangs can be a serious challenge. For instance, to my knowledge it is not known whether the shortest possible Brainfuck solution has been found yet.

Furthermore, while all of Wikipedia (the Wikipedia entry has been deleted but there is a copy at archive.org ), esolangs and Rosetta Code have lists of "Hello, World!" programs, none of these are interested in having the shortest for each language (there is also this GitHub repository). If we want to be a significant site in the code golf community, I think we should try and create the ultimate catalogue of shortest "Hello, World!" programs (similar to how our basic quine challenge contains some of the shortest known quines in various languages). So let's do this!

The Rules

  • Each submission must be a full program.
  • The program must take no input, and print Hello, World! to STDOUT (this exact byte stream, including capitalization and punctuation) plus an optional trailing newline, and nothing else.
  • The program must not write anything to STDERR.
  • If anyone wants to abuse this by creating a language where the empty program prints Hello, World!, then congrats, they just paved the way for a very boring answer.

    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.

  • Submissions are scored in bytes, in an appropriate (pre-existing) encoding, usually (but not necessarily) UTF-8. Some languages, like Folders, are a bit tricky to score - if in doubt, please ask on Meta.
  • This is not about finding the language with the shortest "Hello, World!" program. This is about finding the shortest "Hello, World!" program in every language. Therefore, I will not mark any answer as "accepted".
  • 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 Alphuck), consider adding a note to the existing answer that the same or a very similar solution is also the shortest in the other language.

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 authors actually had to put effort into golfing the code.

For inspiration, check the Hello World Collection.

The 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:

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

/* Configuration */

var QUESTION_ID = 55422; // Obtain this from the url
// It will be like https://XYZ.stackexchange.com/questions/QUESTION_ID/... on any question page
var ANSWER_FILTER = "!t)IWYnsLAZle2tQ3KqrVveCRJfxcRLe";
var COMMENT_FILTER = "!)Q2B_A2kjfAiU78X(md6BoYk";
var OVERRIDE_USER = 8478; // This should be the user ID of the challenge author.

/* App */

var answers = [], answers_hash, answer_ids, answer_page = 1, more_answers = true, comment_page;

function answersUrl(index) {
  return "https://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 "https://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, 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.toLowerCase() > b.lang_raw.toLowerCase()) return 1;
    if (a.lang_raw.toLowerCase() < b.lang_raw.toLowerCase()) 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);
  }

}
body {
  text-align: left !important;
  display: block !important;
}

#answer-list {
  padding: 10px;
  width: 290px;
  float: left;
}

#language-list {
  padding: 10px;
  width: 500px;
  float: left;
}

table thead {
  font-weight: bold;
}

table td {
  padding: 5px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdn.sstatic.net/Sites/codegolf/all.css?v=ffb5d0584c5f">
<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>

\$\endgroup\$
21
  • 3
    \$\begingroup\$ @isaacg No it doesn't. I think there would be some interesting languages where it's not obvious whether primality testing is possible. \$\endgroup\$ Aug 28, 2015 at 13:56
  • 6
    \$\begingroup\$ If the same program, such as "Hello, World!", is the shortest in many different and unrelated languages, should it be posted separately? \$\endgroup\$ Aug 28, 2015 at 15:33
  • 2
    \$\begingroup\$ @mbomb007 Well it's hidden by default because the three code blocks take up a lot of space. I could minify them so that they are a single line each, but I'd rather keep the code maintainable in case bugs come up. \$\endgroup\$ Aug 28, 2015 at 19:34
  • 8
    \$\begingroup\$ @ETHproductions "Unlike our usual rules, feel free to use a language (or language version) even if it's newer than this challenge." Publishing the language and an implementation before posting it would definitely be helpful though. \$\endgroup\$ Aug 29, 2015 at 23:01
  • 2
    \$\begingroup\$ @MartinEnder ... Almost. If two BF solutions have the same size, the one with smaller lexicographical order will take smaller number of bytes in Unary. Of course the smallest Unary solution translated to BF is guaranteed to be smallest. \$\endgroup\$
    – DELETE_ME
    May 20, 2018 at 10:20

932 Answers 932

1
17 18
19
20 21
32
2
\$\begingroup\$

Source Engine Console, 18 bytes

echo Hello, World!

You can't try it online unless Valve ports Half-Life 2 to WASM or something.

This script is pretty basic. It's perfectly valid to echo like this without quotes in the Source Engine.

The Source Engine is a game engine developed by Valve Software, and used in all their games after 2004 (until DOTA 2 in 2015). It provides basic scripting through console commands. You can test this by opening the developer console (enable in settings and press the ` key) and pasting the line.

Tested in Team Fortress 2, CS:GO and Source SDK Base 2013 (Multiplayer).

By inspecting some leftover E3 demo scripts in Half-Life 2, it's revealed there was a rem command which could be a shorter 17 bytes, but this is no longer present in the engine (and I assume that a rem doesn't count because it doesn't print anything). I've yet to test if it exists in Source 2004, but can confirm it's missing in Source 2013.

Technically, the console isn't STDOUT, however the only way to really output to STDOUT is by using the SDK to make a game of my own (obviously compiling to a very large size).

\$\endgroup\$
2
\$\begingroup\$

!@#$%^&*()_+, 17 bytes

 ^dlroW ,olleH(@)

Try it online!

\$\endgroup\$
2
\$\begingroup\$

Pxem, 15 bytes (filename) + 0 byte (contents) = 15 bytes

Filename

Hello, World!.p

Content

(none)

Description of program

The program above should output the phrase without LF. If you'd like LF, here is an alternative filename (19 bytes);

ak.-Hello, World!.p

Description of language

The main feature of this programming language to recognize filename as main routine of the program; content of the file is subroutine.

Implementations

So far there are two major implementations:

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1
  • 2
    \$\begingroup\$ Welcome to the site! Nice first answer, this looks like an interesting language. \$\endgroup\$ Jan 14, 2021 at 13:42
2
\$\begingroup\$

BRASCA, 14 bytes

Another simple Hello, World program.

`Hello, World!

Explanation

`                  - Push everything from here to the next backtick (or EOF) to the stack
 Hello, World!     - The text, duh :^)
<implicit output>  - Output the contents of the stack reversed

Language Link

Github Repo

\$\endgroup\$
2
\$\begingroup\$

Python3, 9 Bytes

import qz

Try online

It's kind of cheating because it's using an external package but I don't think there is another way to pass the boring:

print("Hello, World!")
\$\endgroup\$
3
  • \$\begingroup\$ The first one may be valid, but the second one has almost certainly been done already. Also, it's recommended to link to an online interpreter. I'd suggest TIO, it can even generate markdown for you. Here's an example link \$\endgroup\$
    – user
    Jan 28, 2021 at 21:54
  • 3
    \$\begingroup\$ @user Duplicate answers are allowed. But even were they not, there's clearly been some effort here to post an alternative to the most obvious approach. \$\endgroup\$
    – Dingus
    Jan 28, 2021 at 22:21
  • 1
    \$\begingroup\$ @user Link doesn't work since the module qz isn't installed there, and can't be because of TIO's heavy restrictions :) \$\endgroup\$
    – Makonede
    Apr 13, 2021 at 19:39
2
\$\begingroup\$

Duocentehexaquinquagesimal, 28 bytes

1Ƶ¸ñ=öu¯2–sε`;ÈùˆζT¿āΔIÈ3Wÿ»

Try it online!

\$\endgroup\$
2
  • 2
    \$\begingroup\$ +1 just for the name. \$\endgroup\$
    – emanresu A
    Apr 17, 2021 at 1:17
  • \$\begingroup\$ @Ausername Lol, yeah I picked it because (at least I thought) it was encoded in Base 256. Turns out, since 05AB1E needs to reserve the bullet point for starting and ending Base-256 numbers, it actually uses base 255, but I didn't feel like updating all my answers :P \$\endgroup\$
    – Makonede
    Apr 17, 2021 at 2:10
2
\$\begingroup\$

Vyxal, 8 bytes

`ƈṡ, ƛ€!

Try it Online!

Simply the compressed string Hello, World!

Alternatively,

Vyxal, 2 bytes

kH

Pushes the constant Hello, World!

\$\endgroup\$
1
  • \$\begingroup\$ It reads: 1/2 V, 1/2 v! \$\endgroup\$
    – null
    Aug 29, 2020 at 8:01
2
\$\begingroup\$

Pinecone, 22 bytes

print: "Hello, World!"
\$\endgroup\$
2
\$\begingroup\$

Vyxal, 2 bytes

kH

Pushes the built-in string Hello, World!, with implicit output.

Try it Online!

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2
\$\begingroup\$

1L_a, 3549 2532 bytes

 **********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
 **   *   **    * **       *   *  *  *   **      * *   *    **  * *     *      **  *** *    *  *  *    **      **  *** **    *  *  * ***    **   *       *  **     *  ** *       **  *** *    *  *  *     **       *** *   *   *  *  * *    *  * *   *   *    *   **      *    ** ***   *       *  **  * *     *  **     *  ** *       * *    **  **   * *    *  **  * *  *      *  **  * *   *   *   **  **   *  * *      *  *  *    *
 *       * *  * *     * *    * *  **     **  *   *          *  *      * *  **       *  *  * *  **   **     **       *  *     ** **   *   *  *        *      *   **    *     ***       *  *  * *  **   * *    ***   **  *     * *  **   *       *         *      *     ***   **     *        *      *  *      * *      **    *     **   *   **     *      *       *   *** **    * *      *         *       *       *     ** *  **   **
    ***    *       *    **  *     *    *     **      *        *    **      *    *     **       *    *   *  *    *     **        *    ** **      ***  ** **    * *        *   *    *     **       *    *    *   **      **         *    **   *     * **   **   *    ** *     *   *      ***  ** **    *    **       ** *        *   **      *   *      *  **   *    *      **         *     * **   **   *      **  ** * **     *    *  *
***   **     *  *  *   **   *  *    *     *  *    *     **  *   **  *  **  ** *******    *  *    *  *****  ** * *****    **  *    *     ******  ***  *   *****  *     *  *   ** * *****    *  *    *  **  **   *    *       *  *    *      *****    ***      **    *  *  *  *********  ***  *   ****   **  *  ***  *  *     *  *   *    *  *********  *      *****     *      *  *** ****    ***       *****  **     *  *  *    *  ***
 **********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************

Try it online! (heh, line wrapping makes it look wierd)

Automatically generated by this program, with some golfing (manual + golf.rb).

It is very hard to program in 1L_a, so I use generator. Generator creates cells, each cell prints one bit. It iterates through all possible cells with height 6 and no more than 5 inner asterisks to find a cell that prints the needed bit. Generator fails if height is less than 6 or max asterisk count is less than 5.

This is an ungolfed version with cells visible (13*8 = 104 cells):

  ****** ****** ****** ***** ****** ****** **** **** ****** ***** **** ****** ***** ***** ****** **** ****** ******* ***** ****** ***** **** ****** **** ****** ***** **** ****** ***** **** ******* **** ****** ***** **** ****** ***** ***** **** ***** ******* ***** ***** ****** ***** **** ****** **** ****** ****** ***** ****** **** ******* **** **** ****** ****** **** ******* ***** ****** ****** **** ******* ***** **** ****** ***** ***** **** **** ****** ******* ***** **** ******* ***** ***** ****** ***** ***** ***** ****** **** ****** **** ******* ***** ****** **** ***** **** ******* ***** ****** **** ****** **** ******* **** **** ****** *****
  **   * *   ** *    * * * * *         *      * *  * *  *      ** *        ** * *      ** *    * ** * * * ** *     * *         ** *  ** ** * *    * *  * *  *      ** *        ** *  ** ** * **    * *  * *  * * ***      * **   * *         * *  * **       *  * ** ** *         ** *  ** ** * *    * *  * *  *       ** *         ** ** * *   *      * *  * *  * * *    * *  * * *   * *   * *    * *   ** *        *      ** * ** **   * *         * *  * ** * * * ** *     * *  ** *       *  * ** ** *         ** * *      ** *  ** **   * ** * *    * *  * **  * * *  ** *         * *  ** *  * * *   * *   * *   ** *  * **   * *  * * *        * *  * *  *      **
  *         * * *  * * *        * * *    * ** * *  * **   * *  ** *  * *   ** *   * *          * *  * **         * * *   * **         * *  * *  * * *  * **   * **       * **         * *  * *     * ** * **   * *   * *  * *          * *        * *   * **    * *        ** **         * *  * *  * * *  * **   * * *      *** *   ** *  * *     * ** * *  * **   * *         * *           * *        *       * ***   * **       * *          * *        * *  * **         * * *        * **    * *        ** *   ** *   * **       ** *         * *         * *   *** * * * *    * ** * *        * *           * *         * *         * *     * ** * *  * **   * **   
     *** *    * *         ** *    * **  ** *       * *    * **       * **         * **  * *        ** *    * ***        ** *    * *       ** *         * *    * *   * *  * *    * *       ** *          * *    * ** ** *        ** **  * ** ** *      * * *          ** *   * *    * *       ** *         * *    * *    * *   * **        * **    * *       * *    * **   * *       * ** *   * **   * *    * ** * *     * *   * *        ** **  * ** ** *      ** *    * ***         * ** * *          ** *   * **         * *   * *         ** *  * **   * *      *        ** **   * *        * *       * ** *   * **   * *        ** *  * ** * ** *       * *    * *   *
* **   * **       *  * *  ** *   ** *   ** *  * *      *  * *   * *  * *    * **  * *   * ***  * *      ** * * *  ** *  ** ** *** ***** *      *  * *      *  * ***** *  * ** * * ***** *      **  * *      *       ** **** **  ** **  * *   * **** **  * *     * *  ** *   * ** * * ***** *      *  * *      *  * **  ** *   * *    * *         ** *  * *      *        ** **** *    ** **        ** *    * *  * *  *  * ***** **** **  ** **  * *   * **** *      ** * * *  ** **  * *  * *     * *  ** *   * *    * **  * ***** *** * **  ** *        ** **** *     * *         ** *  * *** * **** *    ** **         * **** **  ** *       *  * *  * *      *  * *****
  ****** ****** ****** ***** ****** ****** **** **** ****** ***** **** ****** ***** ***** ****** **** ****** ******* ***** ****** ***** **** ****** **** ****** ***** **** ****** ***** **** ******* **** ****** ***** **** ****** ***** ***** **** ***** ******* ***** ***** ****** ***** **** ****** **** ****** ****** ***** ****** **** ******* **** **** ****** ****** **** ******* ***** ****** ****** **** ******* ***** **** ****** ***** ***** **** **** ****** ******* ***** **** ******* ***** ***** ****** ***** ***** ***** ****** **** ****** **** ******* ***** ****** **** ***** **** ******* ***** ****** **** ****** **** ******* **** **** ****** *****

See also 1L_a answer to "Add a language to a polyglot" challenge.

\$\endgroup\$
2
\$\begingroup\$

Flurry -bnn, 710 bytes

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

Try it on the online Flurry interpreter!

\$\endgroup\$
2
\$\begingroup\$

AEWNN, 75 bytes

[8+]cpar2[5+]cpa[7+]cpacpa+++cpa [8+]cpar2[15+]cpa+++cpar2[12+]cpar2++++cpa
\$\endgroup\$
1
2
\$\begingroup\$

All of these answers are pretty boring (one is a built-in and the string compression algorithm isn't even my own); consider upvoting some cool answers in tarpits / esolangs rather than this one. I'm just putting it here to have yuno officially be a language on CGCC, and because Hello, World! is a good entry point for any language.

yuno, 1 byte

Try it online!

By default, if the k-literal digraph finds no character after it, it just uses H, because I haven't thought of a good behavior for it otherwise so I may as well save bytes on Hello World.

yuno, 2 bytes

ᴋH

Try it online! Uses the built-in string nilad digraph (inspired by Vyxal).

yuno, 8 bytes

“3ԸaϨ;ψ»

Try it online! Uses a compressed string with the exact same compression algorithm that Jelly uses.

yuno, 15 bytes

“Hello, World!”

Try it online! A default string. As caird coinheringaahing points out, the trailing can be removed if it occurs at the end of the program.

\$\endgroup\$
3
  • \$\begingroup\$ You can omit the trailing from the last one \$\endgroup\$ Jun 21, 2021 at 9:56
  • \$\begingroup\$ @cairdcoinheringaahing I could; just felt like leaving it as the default no-optimization method. I'll leave a note though. \$\endgroup\$
    – hyper-neutrino
    Jun 21, 2021 at 9:58
  • \$\begingroup\$ Re: 'publicizing it maybe it'll force me to actually write it' (from 'yuno-abandoned' answer): do you have any plans to write-up any kind of list of commands or minimal 'how-to'? \$\endgroup\$ Jun 22, 2021 at 9:35
2
\$\begingroup\$

Regenerate, 14 bytes

Hello, World\!

Try it here!

Regenerate is my new regex-match-generation language. The hello world program is pretty simple: just the literal string as a regex, with the ! escaped because it's a metacharacter.

\$\endgroup\$
2
\$\begingroup\$

51AC8, 2 bytes

Kh

Try it Online!

Finally an online interpreter. A little quirk you have to press Run twice.

\$\endgroup\$
2
\$\begingroup\$

Flipbit, 148 134 129 bytes

^>>>^>>>.^<<^<^<<^>>>>>.^<<<^>>>..^<^>.[<]<?>^>^>>.<<^<^>>>.<<<^>>^>^>^.<<<^<^<^>>>>>.[<]?^>>>^>.<<<<?>^>^>>.<<<^>>>.<<<<<?>>>>^.

Try it online!

-14 bytes thanks to Aaron Miller

-5 bytes thanks to Bubbler

How it works

Flipbit uses an infinite tape, consisting of either a 1 or a 0 per cell. The way it outputs is getting all previous elements in the tape, converting that from binary, then indexing into Unicode.

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2
  • 1
    \$\begingroup\$ 134 bytes \$\endgroup\$ Jul 24, 2021 at 4:06
  • 1
    \$\begingroup\$ 129 using Thanos-oriented programming. \$\endgroup\$
    – Bubbler
    Jul 26, 2021 at 8:21
2
\$\begingroup\$

Arduino, 75 bytes

void setup(){Serial.begin(300);Serial.print("Hello, World!");}void loop(){}

Although Arduino does have println(), the challenge said the newline is optional, and print() is shorter.

\$\endgroup\$
5
  • \$\begingroup\$ 74 bytes (untested) \$\endgroup\$
    – user100411
    Aug 16, 2021 at 4:17
  • 1
    \$\begingroup\$ If that works, I could make a lot of mine shorter, but I can't test it either -- I can't find my Arduino board. \$\endgroup\$
    – Bbrk24
    Aug 17, 2021 at 22:23
  • \$\begingroup\$ @tailsparkrabbitear Just tested it. The compiler says error: 'Serial' does not name a type. \$\endgroup\$
    – Bbrk24
    Aug 20, 2021 at 13:10
  • \$\begingroup\$ Then 82 bytes if I use macro instead. \$\endgroup\$
    – user100411
    Aug 20, 2021 at 23:39
  • 1
    \$\begingroup\$ Yes but that's longer than what I currently have (75 < 82). \$\endgroup\$
    – Bbrk24
    Aug 21, 2021 at 2:32
2
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Minim, 44 43 42 Bytes

New solution uses the Carriage Return escape character '\r', saving 1 more byte:

[]="\r!dlroW ,olleH".$<[[0]--]._^![0].C=0.

Thanks to @stasoid for the incidental? realization!

With whitespace and comments:

[] = "\r!dlroW ,olleH". ; Insert the value 13, and "Hello, World!" backwards, \
                          into memory starting from index 0
$< [[0]--].             ; Prints the value at the index stored at index 0 as unicode, \
                          and decrements index 0
_^ ![0].                ; Skip the next statement if index 0 is 0
C = 0.                  ; Sets the program counter to 0, which advances to 1 afterwards

Previous solutions prepended the string with 13...

[]=13&"!dlroW ,olleH".$<[[0]--]._^![0].C=0.

... or used ASCII escape character 0xD (CR) in the string:

[]="\x0D!dlroW ,olleH".$<[[0]--]._^![0].C=0.

GitHub Repository

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2
  • 1
    \$\begingroup\$ newline is optional \$\endgroup\$
    – stasoid
    Aug 24, 2021 at 13:29
  • \$\begingroup\$ @stasoid You are correct! That is actually a typo held over from the original solution, where I put the string counter IN the string, but it ended up being shorter to prepend the counter with the '&' operator. Thanks for the catch! That actually means I can make this one byte shorter still! \$\endgroup\$ Aug 27, 2021 at 1:43
2
\$\begingroup\$

Vim, 14 bytes

iHello, World!

Try it online!

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1
  • \$\begingroup\$ I think this is the shortest it can get \$\endgroup\$
    – PyGamer0
    Oct 9, 2021 at 4:17
2
\$\begingroup\$

Logomocja, 20 bytes

pisz [Hello, World!]

Logomocja is the Polish dialect of Logo, pic related shows the effect of executing the command in its environment

owo

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2
\$\begingroup\$

Hello Hell, 0 bytes


Since the tape is initialized to "Hello, World!", and the contents of the tape are printed automatically at the end of execution, the blank program is a Hello World program.

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2
\$\begingroup\$

ErrLess, 17 bytes

SHello, World!S?.

Prints Hello, World! to stdout, without a trailing newline.

ErrLess is a stack-based language I made for fun over the last few months. You can read the docs here, and I also started a tutorial.

Try it online!

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2
\$\begingroup\$

FROM HERE TO THERE, 27 bytes

FROM "Hello, World!" TO OUT

Try it online!

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2
\$\begingroup\$

JavaScript, 101 85 80 bytes

Thanks to @Redwolf Programs for removing 21 bytes

console.log(String.fromCharCode(72,101,108,108,111,44,32,87,111,114,108,100,33))

Try It Online!

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3
  • \$\begingroup\$ But there is shortest JavaScrpit answer. we allow duplicates. \$\endgroup\$
    – Fmbalbuena
    Nov 24, 2021 at 16:11
  • \$\begingroup\$ You can do String.fromCharCode(...array) to join all the characters into a string, saving a lot of bytes \$\endgroup\$ Nov 24, 2021 at 16:16
  • \$\begingroup\$ Oh, since you're not doing any preprocessing on the array now, you don't even need .... You can just list the characters, so String.fromCharCode(72,101,108,...) \$\endgroup\$ Nov 24, 2021 at 16:23
2
\$\begingroup\$

Woodchuck, 1161 bytes

Woodchuck is a derivative of BF which uses binary trees. Here is the hello world program.

>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[^^<>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[^^<>>[>]>^<^[^]^>>[>]>^<^[^]^<>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^<>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^<>>[>]>^<^[^]^^^^^>>[>]%<%^[^]^>>]^^<>>[>]>^<^[^]^<>>[>]>^<^[^]^<>>[>]%<%^[^]^<<>>[>]>^<^[^]^>>[^^^>>]^^^>>[>]%<%^[^]^>>]^^<<>>[>>>[>]>^<^[^]^].^[^]^<>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>>>[>]>^<^[^]^].^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>>>[>]>^<^[^]^].^[^]^>>[>>>[>]>^<^[^]^].^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>>>[>]>^<^[^]^].^[^]^<<>>[>>>[>]>^<^[^]^].^[^]^^>>[>]%<%^[^]^>>[>>>[>]>^<^[^]^].^[^]^^>>[>>>[>]>^<^[^]^].^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>>>[>]>^<^[^]^].^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>>>[>]>^<^[^]^].^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>]%<%^[^]^>>[>>>[>]>^<^[^]^].^[^]^<<>>[>]>^<^[^]^>>[>>>[>]>^<^[^]^].^[^]^<>>[>]>^<^[^]^>>[>]>^<^[^]^>>[>>>[>]>^<^[^]^].^[^]^

Umm... That's quite complex. However, woodchuck is Turing complete, so...

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2
\$\begingroup\$

Python is Magic, 2163 bytes

__builtins__.__getattribute__(__doc__.__repr__.__name__.__getitem__(__doc__.__class__.__class__.__name__.__len__()).__add__(__doc__.__str__.__name__.__getitem__(__doc__.__class__.__class__.__name__.__len__()).__add__(__name__.__len__().__class__.__name__)))(__builtins__.__getattribute__(__annotations__.__class__.__name__.__getitem__(__annotations__.__str__().__len__()).__add__(__doc__.__hash__.__name__.__getitem__(__annotations__.__str__().__len__()).__add__(__name__.__class__.__name__.__getitem__(__annotations__.__str__().__len__()))))(__name__.__len__().__mul__(__name__.__len__().__invert__().__neg__())).__add__(__doc__.__repr__.__name__.__getitem__(__name__.__class__.__name__.__len__()).__add__(__name__.__mul__.__name__.__getitem__(__doc__.__class__.__class__.__name__.__len__()).__mul__(__annotations__.__str__().__len__()).__add__(__doc__.__bool__.__name__.__getitem__(__name__.__class__.__name__.__len__()).__add__(__builtins__.__getattribute__(__doc__.__dir__().__class__.__name__)(__name__).__str__().__getitem__(__doc__.__class__.__class__.__name__.__len__()).__add__(__name__.__eq__.__doc__.__getitem__(__name__.__eq__.__name__.__len__()).__add__(__builtins__.__dir__().__getitem__(__name__.__class__.__name__.__len__().__mul__(__doc__.__class__.__class__.__name__.__len__().__mul__(__name__.__sizeof__.__name__.__len__()))).__getitem__(__doc__.__class__.__class__.__name__.__len__()).__add__(__doc__.__bool__.__name__.__getitem__(__name__.__class__.__name__.__len__()).__add__(__doc__.__str__.__name__.__getitem__(__doc__.__class__.__class__.__name__.__len__()).__add__(__name__.__mul__.__name__.__getitem__(__doc__.__class__.__class__.__name__.__len__()).__add__(__name__.__mod__.__name__.__getitem__(__doc__.__class__.__class__.__name__.__len__()).__add__(__builtins__.__getattribute__(__annotations__.__class__.__name__.__getitem__(__annotations__.__str__().__len__()).__add__(__doc__.__hash__.__name__.__getitem__(__annotations__.__str__().__len__()).__add__(__name__.__class__.__name__.__getitem__(__annotations__.__str__().__len__()))))(__name__.__class__.__name__.__len__().__mul__(__name__.__getitem__.__name__.__len__()))))))))))))))

Try it online!

To check if the code is valid then

import re, sys
allowed = r"A-Za-z().,_"
regex = r"(?:__)?([{}]+)(?:__)?".format(allowed)
banned = r"[^{}]".format(allowed)
script = input()

if re.findall(banned, script): 
    raise SyntaxError("Only letters, parenthesis, dot and underscore are allowed.")
print("Valid!")
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4
  • 1
    \$\begingroup\$ 1311 bytes \$\endgroup\$
    – Bgil Midol
    Dec 20, 2021 at 19:43
  • \$\begingroup\$ @grandBagel Why? \$\endgroup\$
    – Fmbalbuena
    Dec 20, 2021 at 20:33
  • \$\begingroup\$ It seems like you've copied this directly from the esolangs page without any modifications (such as the trivial one that @grandBagel points out). This isn't disallowed per se, but you should try to optimise for bytes in code-golf \$\endgroup\$
    – Jo King
    Dec 20, 2021 at 21:44
  • \$\begingroup\$ @BgilMidol Here it is with a working interpreter \$\endgroup\$
    – DLosc
    Feb 3 at 16:55
2
\$\begingroup\$

Lexurgy, 23 bytes

For a tool meant for handling strings, it's surprisingly lengthy to output any string longer than 1 or 2 characters without any input.

a:
*=>Hello\,\ World\!
\$\endgroup\$
2
\$\begingroup\$

Seriously, 1 byte

H

Try it online!

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1
  • 1
    \$\begingroup\$ Time for the "Seriously?" joke. \$\endgroup\$
    – null
    Feb 3 at 14:33
2
\$\begingroup\$

Lean, 22 bytes

#print "Hello, World!"

Try it online!

Shouldn't be on this list at the moment!

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2
  • \$\begingroup\$ Why shouldn't it be on the list at the moment? \$\endgroup\$
    – Bgil Midol
    Feb 18 at 0:30
  • \$\begingroup\$ Well, it wasn't until now, was it? \$\endgroup\$ Feb 18 at 0:42
2
\$\begingroup\$

Python, 22 Bytes

In Python, this is pretty straight-forward:

print("Hello, World!")

This is equivalent to

import sys
sys.stdout.write("Hello, World!")

which is 44 bytes.

If you are in the interpreter, "Hello World" would return itself, but I doubt it goes to sys.stdout.

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4
  • 1
    \$\begingroup\$ Welcome to Code Golf! This site is for competitive programming, so answers should include a byte count rather than just solving the problem. \$\endgroup\$ Feb 3 at 6:08
  • \$\begingroup\$ I agree, but I need help on finding the bytes in my code, can you help me out? If you can, I'll edit it and send it again! \$\endgroup\$ Feb 3 at 6:11
  • 1
    \$\begingroup\$ See Blue's solution, same code, so same byte count. Anyway, if you include a link to TIO like this: Try it online!, there it tells you the byte count: “22 chars, 22 bytes (UTF-8)”. \$\endgroup\$
    – manatwork
    Feb 3 at 6:20
  • 7
    \$\begingroup\$ I don't think this answer deserves three downvotes. It's a duplicate, but those are explicitly allowed under site rules. It didn't have a byte count at first, but this is a new user and it's not uncommon for people to not be sure how the byte counts work at first. It made effort to explain how the answer works, which is already more effort shown than a good 80% of the answers on this challenge. \$\endgroup\$ Feb 3 at 17:41
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