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 475th jorbDehmel 🇺🇸 561 82 1ms 20 Sep 2024 482nd PeriBooty 554 83 11ms 26 Nov 2019 482nd Smetalo 554 83 1ms 25 Aug 2022 482nd Qruintrox 554 83 2ms 24 Jun 2023 485th phpboyscout 548 84 2ms 26 May 2021 485th OttscoMC 548 84 1ms 18 Jun 2021 485th ANovelForStudy 548 84 1ms 9 Jun 2023 485th fkantelberg 548 84 2ms 15 Jul 2023 485th sbercx 548 84 11ms 29 Jul 2023 490th mxwli 541 85 1ms 16 May 2021 490th Kasci 541 85 2ms 7 Dec 2021 490th stonethurg 541 85 2ms 14 Feb 2023 490th VictorFordham 541 85 1ms 4 Mar 2023 490th ilovapples 541 85 2ms 9 Jun 2025 495th drkameleon 🇪🇸 535 86 10ms 28 Jan 2020 495th ms-tingliang 535 86 2ms 6 Aug 2022 495th AZ9tumas 535 86 2ms 15 Oct 2022 495th GWStuart 535 86 2ms 15 Sep 2023 495th Giantnoodlemonster 535 86 2ms 15 Sep 2024 495th BlueGummi 535 86 11ms 15 Apr 2025 501st vonKrafft 529 87 2ms 25 Mar 2020 501st tm70 529 87 11ms 23 Jan 2021 501st ArianKG 529 87 1ms 21 Mar 2024 504th ottsco7697 523 88 1ms 3 Jul 2019 504th RustemB 🇷🇺 523 88 1ms 25 Aug 2020 504th TerenceTux 523 88 1ms 6 Jun 2023 504th BpbjsGreen 🇨🇳 523 88 1ms 7 Jul 2024 504th kurkale6ka 523 88 2ms 15 Aug 2024 509th ryguyNelson 517 89 1ms 12 Aug 2020 509th mhenion8293 🇺🇸 517 89 2ms 5 Jun 2021 509th ze-h 🇺🇸 517 89 1ms 19 Feb 2022 509th S-Ruban 517 89 1ms 26 Feb 2023 509th uncertaain 517 89 1ms 28 Dec 2023 509th tik25 517 89 1ms 28 Mar 2024 509th iilegacyyii 517 89 7ms 20 Jan 2025 516th humz2k 511 90 1ms 26 Sep 2022 516th Jaro32768 🇸🇰 511 90 1ms 20 Sep 2023 518th Verlio-H 505 91 2ms 17 Feb 2025 519th lilyyy411 500 92 1ms 10 Sep 2021 519th bryanmytko 500 92 14ms 5 Jul 2022 519th 104210 500 92 2ms 14 Sep 2022 519th DrPiranoid 500 92 1ms 22 Sep 2022 523rd sm1lko 495 93 2ms 7 Dec 2022 523rd aDwarfNamedUrist 495 93 11ms 12 Jul 2023 523rd Sephirem98 495 93 1ms 24 Oct 2023 523rd Unknownuserfrommars 495 93 1ms 20 Nov 2024 523rd 0xA00 495 93 11ms 13 days ago 528th ArturLukianov 489 94 1ms 10 Aug 2020 528th Mortis66666 489 94 2ms 27 May 2022 528th PeytonNowlin 489 94 2ms 9 Oct 2025 531st abailey2020 🇺🇸 484 95 2ms 3 Oct 2020 531st lemmaandrew 484 95 2ms 23 Jan 2021 531st zt14427 484 95 1ms 28 Feb 2023 531st epic-programmer-guy 484 95 2ms 17 Dec 2023 531st MID246 484 95 2ms 14 Nov 2024 536th dmoa 479 96 2ms 21 Mar 2021 536th shagunsingh30 479 96 1ms 2 Apr 2022 538th nico-bachner 474 97 2ms 28 Dec 2020 538th atazzam 🇺🇸 474 97 1ms 2 Sep 2022 540th GnotAGnelf 469 98 2ms 24 Nov 2020 540th kennyhow 469 98 1ms 27 Jan 2021 540th Robbe7730 469 98 1ms 17 Nov 2021 543rd azure-blondon 460 100 2ms 18 Aug 2024 544th aaronze 🇦🇺 455 101 1ms 29 Apr 2021 544th NovemberOrWhatever 455 101 2ms 6 Nov 2022 546th 4ndyJ 🇬🇧 451 102 2ms 17 Dec 2022 547th cgjohannsen 447 103 2ms 10 Jun 2022 548th 52525rr 442 104 1ms 20 Oct 2025 549th MisterrLuck 438 105 1ms 11 Sep 2023 550th adoxography 434 106 11ms 3 Oct 2019 550th siddharth2411 434 106 1ms 22 Mar 2020 552nd MunibullahShah 426 108 2ms 31 Aug 2019 553rd george1605 422 109 2ms 14 Feb 2023 554th Zach1031 418 110 2ms 15 Nov 2025 555th barbu110 407 113 13ms 2 Dec 2019 556th JesseNoEyes 🇺🇸 400 115 2ms 4 Oct 2024 557th milliorn 393 117 2ms 9 Feb 2020 557th plainoldcheese 🇦🇶 393 117 2ms 23 Mar 2023 559th Chesium 387 119 2ms 9 Aug 2020 560th kenballus 383 120 11ms 12 Nov 2019 First Prev 481–560 of 593 Next Last