Ctrl+P again to print, arrows/tab to navigate results, enter to confirm

    About

    Do I need to log in to play?
    No. Submitted solutions will be executed and checked without logging in, but nothing will be saved and you won't appear on the leaderboards.
    Is code.golf free as in speech?
    Yes! It is written in Go, licensed under MIT, and available on GitHub; patches welcome!
    Is code.golf free as in beer?

    Yes! However hosting isn't, so if you enjoy Code Golf consider donating to its continued existence and improvement via GitHub Sponsors.

    Sponsors will receive a couple of additional perks, with more planned:

    * Badge hidden if sponsorship is anonymous.
    Free Sponsor
    Profile Badge No Yes *
    Follow Limit 10 24
    Solution Notes No Yes
    What languages are supported?

    ><>

    96b1cfc

    Assembly

    DefAssembler 2.4.5

    AWK

    GNU AWK 5.3.2

    Bash

    5.3.3

    BASIC

    FreeBASIC 1.10.1

    Berry

    1.1.0

    brainfuck

    077cc7f

    C

    TCC 0.9.27

    C#

    C# 13.0 on .NET 9.0.6

    C++

    Clang 20.1.8

    Civet

    0.10.5

    Clojure

    Babashka 1.12.206

    COBOL

    GnuCOBOL 3.2.0

    Coconut

    3.1.2

    Common Lisp

    GNU CLISP 2.49.92

    Crystal

    1.17.1

    D

    DMD 2.111.0

    Dart

    3.8.1

    Elixir

    1.18.4

    F#

    F# 9.0 on .NET 9.0.6

    Factor

    0.100

    Forth

    GNU Forth 0.7.3

    Fortran

    GNU Fortran 15.1.0

    Gleam

    1.11.1

    Go

    1.24.5

    GolfScript

    6155e9f

    Haskell

    GHC 9.8.2

    Hexagony

    770406a

    J

    9.6

    Janet

    1.38.0

    Java

    OpenJDK 24.0.2

    JavaScript

    V8 13.8.500258

    jq

    1.8.1

    Julia

    1.11.6

    K

    544d014afd

    Kotlin

    2.2.0

    Lua

    5.4.8

    Nim

    2.2.4

    OCaml

    5.3.0

    Pascal

    FPC 3.2.2

    Perl

    5.42.0

    PHP

    8.4.10

    PowerShell

    PowerShell 7.5.2 on .NET 9.0.6

    Prolog

    SWI-Prolog 9.2.9

    Python

    3.13.5

    R

    4.5.1

    Raku

    Raku 6.d on Rakudo 2025.06.1

    Rockstar

    2.0.31

    Ruby

    3.4.5

    Rust

    1.88.0

    Scheme

    Chez Scheme 10.2.0

    sed

    GNU sed 4.9

    SQL

    SQLite 3.50.3

    Swift

    6.1.2

    Tcl

    9.0.2

    TeX

    3.141592653

    V

    0.4.11

    VimL

    9.1

    Wren

    0.4.0

    Zig

    0.14.1

    Experimental languages:

    05AB1E

    c31668b

    ALGOL 68

    Algol 68 Genie 3.5.15

    APL

    Dyalog APL 19.0.50027

    Arturo

    5f3443c

    Befunge

    b7bf640

    BQN

    CBQN 0.9.0

    CJam

    0.6.5

    CoffeeScript

    2.7.0

    Egel

    0.1.14

    Erlang

    OTP 28.0.2

    Fennel

    1.5.3

    Groovy

    4.0.27

    Harbour

    3.0.0

    Hare

    0.24.2

    Haxe

    4.3.7

    Hush

    0.1.4

    Hy

    1.1.0

    iogii

    1.1

    Odin

    2025-07

    Picat

    3.8

    Qore

    2.1.2

    Racket

    8.17

    Rebol

    2.7.8.4.10

    Rexx

    Regina 3.9.7

    Scala

    2.13.16

    Squirrel

    3.2

    Stax

    1.2.1

    Uiua

    0.16.2

    Umka

    1.5.3

    Vala

    0.56.18

    Vyxal

    3.8.0

    If you'd like to see another language added then raise an issue.

    Are warnings ignored?
    Yes. Only STDOUT is checked against the solution, STDERR is however shown back to you to ease debugging.
    Is trailing whitespace ignored?
    Trailing whitespace is trimmed from each line and the entire output, except when solving Quine.
    How are arguments passed to my program?
    Some holes pass arguments, for those your program should read them from the command line arguments (ARGV).
    How do I print Unicode characters?

    Your source code is sent to the interpreter encoded in UTF-8, and is expected to write output encoded in UTF-8 to STDOUT. For languages where it matters, your code is run in the en_US locale with a UTF-8 output encoding.

    In Unicode-aware languages like Python, this means print("🙂") and print(chr(0x1f642)) both produce the emoji U+1F642 "Slightly Smiling Face" 🙂, which is encoded as f0 9f 99 82 in UTF-8.

    In less Unicode-aware languages where strings are byte strings, you might still get away with UTF-8 in string literals. For example, OCaml treats "🙂" as a string of length 4 (four bytes), but Char.chr 0x1f642 is an error.

    In yet other languages, like brainfuck, you have to print the individual bytes f0 9f 99 82 one by one.

    How are solutions ranked?
    There are two scorings in use, bytes and chars. Bytes is the number of bytes of a solution encoded in UTF-8. Chars is the number of Unicode codepoints of a solution. Users may submit up to two solutions per hole per language. This is handled automatically when you enter two solutions and each minimizes a different scoring. Each scoring has its own set of leaderboards. For the chars scoring, both “A” (U+0041 Latin Capital Letter A) and “😉” (U+1F609 Winking Face) cost the same despite the 1:4 ratio in byte count in UTF-8.
    How are solutions scored?
    For each hole, in each language, up to 1,000 points are available. The formula is:
    Points = Sb ÷ Su × 1000
    Where Su is the length of the user's solution, and Sb is a Bayesian estimator of the form:
    Sb = ((√n + 2) ÷ (√n + 3)) × S + (1 ÷ (√n + 3)) × Sa
    n is the number of solutions in this hole in this language. S is the length of the shortest solution in this hole in this language. Sa is the shortest solution among all languages in this hole.

    The confidence interval is chosen such that the shortest solution in any language will receive a score of at least 750.

    Your overall score is the sum of your highest points in each hole.

    Are submissions resource-constrained?
    Yes. Execution time is limited to 5 seconds, CPU & RAM usage is unbounded but this will probably change soon. The length of each solution must be lower than 128 KiB as that's the maximum length of any program argument under Linux.
    Is there an API?
    An API is currently being developed and documented in standard OpenAPI format. A legacy API that just returns scores in JSON exists. The URL is /scores/all-holes/all-langs/all. Note that all-holes and all-langs may be replaced by the names of specific holes and languages.
    Can I see other people's solutions?
    No, that way all holes stay competitive. If you're stuck on how to shave a couple of strokes off your solution then why not visit our Discord server for some advice.