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 373rd tfkls 708 65 2ms 18 Aug 2020 373rd CaraCompSci 708 65 2ms 10 Oct 2020 373rd sech1p 🇵🇱 708 65 2ms 30 Oct 2021 373rd b10011 🇫🇮 708 65 2ms 3 Jan 2023 373rd calinous 🇷🇴 708 65 1ms 27 Feb 2023 373rd rifatx 708 65 1ms 24 Jul 2024 373rd mhgockel 708 65 1ms 21 Jun 2025 383rd citsur 697 66 1ms 1 Jun 2019 383rd generot 🇧🇬 697 66 2ms 9 Apr 2020 383rd resetcentral 697 66 2ms 22 May 2022 383rd destofr 697 66 2ms 23 Aug 2022 383rd piano-miles 697 66 2ms 30 Mar 2023 383rd mikiymk 697 66 2ms 21 Sep 2023 383rd feherd 697 66 2ms 16 Nov 2023 383rd Just4FunCoder 697 66 1ms 26 Aug 2024 383rd Upload-and-View 🇺🇦 697 66 1ms 21 Aug 2025 392nd asadullayev 687 67 1ms 9 Dec 2020 392nd godraadam 687 67 1ms 13 Apr 2021 392nd Xwilarg 🇫🇷 687 67 1ms 17 Nov 2021 392nd michatmon 687 67 2ms 11 Jan 2022 392nd martinnorling 🇸🇪 687 67 1ms 8 Feb 2022 392nd JasonRaubenheimer 687 67 1ms 8 Jul 2023 392nd jtaxen 687 67 1ms 26 Apr 2024 392nd CutSandstone 687 67 1ms 5 Jul 2024 400th pingu19 676 68 1ms 16 Oct 2019 400th mxchen2001 676 68 2ms 18 Nov 2020 400th LeeCamp 676 68 1ms 28 Apr 2022 400th esseeffeenne 676 68 1ms 6 Jun 2022 400th GameChaos 676 68 1ms 16 Jun 2022 405th xnacly 🇩🇪 667 69 1ms 30 Jun 2023 405th Pyro569 667 69 1ms 30 Jul 2023 405th eiburns 667 69 1ms 7 Sep 2023 405th CheeseCake628 🇳🇴 667 69 2ms 11 Oct 2023 405th viitanet 667 69 1ms 22 Oct 2023 405th hacker112 🇸🇪 667 69 1ms 12 Jun 2024 405th msbranicky 667 69 2ms 3 Jul 2024 405th SwordF-Official 667 69 1ms 3 Jun 2025 405th Alex-Huggett 🇬🇧 667 69 2ms 13 Sep 2025 414th PatrickLove 657 70 1ms 26 Jun 2019 414th furokku 657 70 1ms 14 Feb 2021 414th TornadoCookie 657 70 1ms 16 Oct 2022 414th gabe-gallegos 657 70 2ms 25 Mar 2025 414th RYSF13 🇨🇳 657 70 2ms 19 Jul 2025 419th chunky 648 71 1ms 2 Oct 2020 419th jackrosenb 648 71 1ms 7 Oct 2020 419th Lizard314 648 71 1ms 10 Nov 2020 419th yoshykai 648 71 1ms 16 Jun 2023 419th jccummi1 648 71 1ms 29 Oct 2023 419th LawrenceZ1A 🇨🇦 648 71 1ms 25 Feb 2024 419th nstearns96 🇬🇧 648 71 2ms 13 Sep 2024 426th kendstott 639 72 1ms 25 Jun 2019 426th kirbyyourmom 🇬🇧 639 72 2ms 2 Mar 2021 426th mqyhlkahu 639 72 1ms 10 Sep 2023 426th 0dyse 639 72 2ms 6 May 2025 430th DrProfPatPending 630 73 1ms 25 Jun 2019 430th nwdamgaard 630 73 2ms 19 Dec 2021 430th albanian-laundromat 630 73 3ms 10 Nov 2025 433rd willpiam 622 74 1ms 21 Sep 2021 433rd dillon-duncando 622 74 2ms 24 Dec 2021 433rd Vexxter9 🇳🇱 622 74 1ms 20 Sep 2024 436th KiwiKoder0123 613 75 1ms 28 Jun 2019 436th StHagel 613 75 2ms 25 May 2023 436th Azearia 613 75 1ms 9 Aug 2023 436th NDR0216 🇹🇼 613 75 12ms 8 May 2024 436th RedzGoose 🇦🇺 613 75 1ms 19 Sep 2024 436th Sciman101 613 75 2ms 26 Mar 2025 442nd HectorPeeters 605 76 11ms 26 Mar 2021 442nd opsiff 605 76 2ms 8 Aug 2021 442nd iwalker2702 605 76 2ms 9 Nov 2021 442nd GreenBeansAgainstVeganism 605 76 11ms 28 May 2022 442nd james-downey 605 76 12ms 14 Jul 2022 442nd DaCuteRaccoon 605 76 1ms 12 Dec 2022 442nd NeatCrown 🇨🇦 605 76 2ms 14 Dec 2022 442nd tvcv901 605 76 10ms 22 Mar 2023 442nd hjcafaroUC 605 76 2ms 5 Aug 2023 First Prev 376–450 of 590 Next Last