Fibonacci in C in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 394th CutSandstone 687 67 1ms 5 Jul 2024 402nd pingu19 676 68 1ms 16 Oct 2019 402nd mxchen2001 676 68 2ms 18 Nov 2020 402nd LeeCamp 676 68 1ms 28 Apr 2022 402nd esseeffeenne 676 68 1ms 6 Jun 2022 402nd GameChaos 676 68 1ms 16 Jun 2022 407th xnacly 🇩🇪 667 69 1ms 30 Jun 2023 407th Pyro569 667 69 1ms 30 Jul 2023 407th eiburns 667 69 1ms 7 Sep 2023 407th CheeseCake628 🇳🇴 667 69 2ms 11 Oct 2023 407th viitanet 667 69 1ms 22 Oct 2023 407th hacker112 🇸🇪 667 69 1ms 12 Jun 2024 407th msbranicky 667 69 2ms 3 Jul 2024 407th SwordF-Official 667 69 1ms 3 Jun 2025 407th Alex-Huggett 🇬🇧 667 69 2ms 13 Sep 2025 407th zgialor-lab 667 69 2ms 36 hours ago 417th PatrickLove 657 70 1ms 26 Jun 2019 417th furokku 657 70 1ms 14 Feb 2021 417th TornadoCookie 657 70 1ms 16 Oct 2022 417th gabe-gallegos 657 70 2ms 25 Mar 2025 417th RYSF13 🇨🇳 657 70 2ms 19 Jul 2025 422nd chunky 648 71 1ms 2 Oct 2020 422nd jackrosenb 648 71 1ms 7 Oct 2020 422nd Lizard314 648 71 1ms 10 Nov 2020 422nd yoshykai 648 71 1ms 16 Jun 2023 422nd jccummi1 648 71 1ms 29 Oct 2023 422nd LawrenceZ1A 🇨🇦 648 71 1ms 25 Feb 2024 422nd nstearns96 🇬🇧 648 71 2ms 13 Sep 2024 429th kendstott 639 72 1ms 25 Jun 2019 429th kirbyyourmom 🇬🇧 639 72 2ms 2 Mar 2021 429th mqyhlkahu 639 72 1ms 10 Sep 2023 429th 0dyse 639 72 2ms 6 May 2025 433rd DrProfPatPending 630 73 1ms 25 Jun 2019 433rd nwdamgaard 630 73 2ms 19 Dec 2021 433rd albanian-laundromat 630 73 3ms 10 Nov 2025 436th willpiam 622 74 1ms 21 Sep 2021 436th dillon-duncando 622 74 2ms 24 Dec 2021 436th Vexxter9 🇳🇱 622 74 1ms 20 Sep 2024 439th KiwiKoder0123 613 75 1ms 28 Jun 2019 439th StHagel 613 75 2ms 25 May 2023 439th Azearia 613 75 1ms 9 Aug 2023 439th NDR0216 🇹🇼 613 75 12ms 8 May 2024 439th RedzGoose 🇦🇺 613 75 1ms 19 Sep 2024 439th Sciman101 613 75 2ms 26 Mar 2025 445th HectorPeeters 605 76 11ms 26 Mar 2021 445th opsiff 605 76 2ms 8 Aug 2021 445th iwalker2702 605 76 2ms 9 Nov 2021 445th GreenBeansAgainstVeganism 605 76 11ms 28 May 2022 445th james-downey 605 76 12ms 14 Jul 2022 445th DaCuteRaccoon 605 76 1ms 12 Dec 2022 445th NeatCrown 🇨🇦 605 76 2ms 14 Dec 2022 445th tvcv901 605 76 10ms 22 Mar 2023 445th hjcafaroUC 605 76 2ms 5 Aug 2023 445th ridingqwerty 🇺🇸 605 76 11ms 21 Dec 2023 455th ramytarchichy 597 77 12ms 22 Jun 2019 455th EnergeticBark 597 77 2ms 14 Jul 2019 455th jngbsn 597 77 1ms 30 Jun 2020 455th ei14 597 77 11ms 23 Jun 2021 455th mickmurci 597 77 12ms 7 Apr 2023 455th IdkWhatIsIdk 597 77 1ms 27 Nov 2024 461st DeepuBenson 590 78 1ms 27 Mar 2020 461st dev-loop0 590 78 2ms 20 Aug 2020 461st oschmidh 590 78 11ms 18 Nov 2020 461st muztanger 590 78 2ms 1 Jan 2021 461st 444nuits 590 78 12ms 31 Jan 2022 461st junten1 590 78 1ms 18 Oct 2024 467th davidgblanes 582 79 2ms 22 Sep 2019 467th SiBeepBoop 582 79 17ms 14 Apr 2025 469th volpi-m 🇫🇷 575 80 1ms 30 Aug 2020 469th denballakh 575 80 1ms 25 Nov 2021 469th Adix-null 🇱🇹 575 80 2ms 4 Jul 2023 469th StupidHobbit 575 80 2ms 23 days ago 473rd NJRist 🇺🇸 568 81 2ms 24 Nov 2022 473rd s-gannon 568 81 14ms 3 May 2023 475th markus-rekdal 561 82 11ms 4 Jun 2019 475th stdstijn 561 82 2ms 10 May 2020 475th Adrien-AM 561 82 12ms 31 Jan 2022 475th CameronGBell 561 82 2ms 10 Nov 2022 475th dpethes 561 82 2ms 9 Jan 2024 475th PyryL 🇫🇮 561 82 2ms 23 Aug 2024 First Prev 401–480 of 593 Next Last