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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 236th c0d3-4-F00d 🇩🇪 868 53 5ms 6 Jan 2022 236th Gosefu 868 53 1ms 13 Jul 2022 236th raphaelimahorn 868 53 1ms 3 Oct 2022 236th namcartoon06 868 53 1ms 30 Jun 2023 236th gussy420 868 53 1ms 28 Oct 2023 236th Szum123321 🇵🇱 868 53 1ms 25 Nov 2023 236th funnyboy-roks 868 53 2ms 14 Jun 2024 236th Mychecksdead 868 53 1ms 25 Jul 2024 236th NickTheEASDude 🇺🇸 868 53 2ms 29 Aug 2024 236th snyderek 🇺🇸 868 53 1ms 20 Jan 2025 236th ReterikHub 868 53 1ms 24 Apr 2025 236th camren-m 868 53 1ms 23 May 2025 236th arvidjonasson 868 53 2ms 7 Jun 2025 236th VeryHolyCheeeese 🇫🇮 868 53 2ms 25 Jun 2025 236th trinityy-7 868 53 2ms 7 Aug 2025 236th Matter1024 🇮🇳 868 53 2ms 23 days ago 257th redstarrer 852 54 1ms 12 Jan 2021 257th rqberry 852 54 1ms 8 Mar 2023 257th kyokucyou 🇩🇪 852 54 1ms 13 Mar 2023 257th nishantc1527 852 54 1ms 5 Apr 2023 257th Garklein 🇨🇦 852 54 1ms 23 Oct 2023 257th Stockoh 🇫🇷 852 54 1ms 4 Nov 2024 257th heanyang1 852 54 1ms 22 Apr 2025 257th myirci 852 54 2ms 15 Jun 2025 257th blaztoma 🇱🇹 852 54 1ms 17 Aug 2025 257th Apataras 852 54 1ms 2 Sep 2025 257th Pyroan 852 54 2ms 20 Mar 2026 268th rambox11 836 55 1ms 12 Mar 2019 268th AkashTandon167 836 55 1ms 25 Sep 2019 268th AasiApina 836 55 1ms 28 Jan 2020 268th minarjos 836 55 2ms 12 Jan 2021 268th rak1507 🇬🇧 836 55 1ms 1 Feb 2021 268th boxjelly 836 55 1ms 15 Feb 2021 268th ktiy 836 55 1ms 19 Apr 2021 268th starxingchenc 836 55 1ms 3 Jul 2021 268th blasio99 836 55 1ms 2 Nov 2021 268th rick-gnous 836 55 1ms 5 Nov 2021 268th LorenzoDeGaspari 836 55 1ms 20 Jun 2022 268th AnnoyedArt1256 836 55 1ms 19 Aug 2022 268th ndren 836 55 1ms 6 Aug 2023 268th triedel42 836 55 1ms 15 May 2024 268th LHLaurini 🇧🇷 836 55 1ms 30 Jun 2024 268th Mabeloid 🇳🇴 836 55 1ms 23 Oct 2025 284th alexjlaberge 821 56 1ms 8 Mar 2019 284th serenac26 821 56 1ms 2 May 2019 284th shuding 821 56 1ms 12 May 2020 284th ytaki0801 🇯🇵 821 56 1ms 19 Jun 2021 284th jgbaldwinbrown 821 56 1ms 2 Jul 2021 284th ACMichels 821 56 1ms 13 Aug 2021 284th LordAzyks 🇫🇷 821 56 1ms 30 Jun 2022 284th MCausc78 🇺🇦 821 56 1ms 5 Jan 2023 284th aevykt 821 56 1ms 29 Oct 2023 284th DevinJFarmer 821 56 1ms 29 Oct 2023 284th ashtraypettingzoo 🇺🇸 821 56 1ms 19 Mar 2024 284th 2022dyx 821 56 2ms 19 Jul 2024 284th desecaw13 821 56 1ms 24 Jan 2025 284th Emutis 🇱🇹 821 56 2ms 16 Aug 2025 284th ApoChagi 821 56 1ms 21 Oct 2025 284th deglebe 821 56 2ms 3 Nov 2025 284th JOrE20 821 56 2ms 3 Feb 2026 301st ahenningsen 807 57 1ms 5 May 2019 301st ieeemma 807 57 1ms 30 Apr 2020 301st agrukuki 807 57 1ms 20 Sep 2020 301st ngocbd 🇻🇳 807 57 1ms 25 Sep 2020 301st iznax 807 57 1ms 16 Oct 2020 301st b-paul 807 57 1ms 25 Dec 2020 301st TheHammerBro 807 57 1ms 30 Apr 2021 301st shibacho 🇯🇵 807 57 1ms 18 Mar 2022 301st AndreaNeti 807 57 2ms 16 Jun 2022 301st menezesd 807 57 2ms 1 Dec 2022 301st Ripick 807 57 1ms 30 Apr 2023 301st imma-Spring 807 57 1ms 2 Nov 2023 301st rsgray 807 57 2ms 29 Dec 2023 301st loganmacdougall 🇨🇦 807 57 1ms 19 Jan 2024 301st jbjd 807 57 1ms 24 Feb 2024 301st Jigglypuffed 807 57 1ms 15 Jul 2025 301st KAKISKA-code 🇫🇮 807 57 1ms 24 Sep 2025 301st FortuiteMan 🇫🇷 807 57 2ms 28 Nov 2025 319th MadMax129 793 58 2ms 25 Dec 2019 319th bastienvoirin 🇫🇷 793 58 1ms 24 Apr 2020 First 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