Fibonacci in JavaScript 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 452nd jbjd 750 44 10ms 24 Feb 2024 452nd xyangst 750 44 11ms 8 Oct 2024 452nd TheAtrossian 750 44 12ms 27 Mar 2025 452nd codewrite 🇬🇧 750 44 10ms 18 Apr 2025 452nd blaztoma 🇱🇹 750 44 11ms 17 Aug 2025 452nd audigamer 750 44 11ms 19 Oct 2025 452nd c-py 750 44 9ms 2 Nov 2025 488th Nuottajarvi 733 45 11ms 9 Aug 2018 488th ConorOBrien-Foxx 733 45 9ms 20 Dec 2018 488th skps2010 733 45 11ms 1 Jan 2019 488th andriynoskov 733 45 10ms 20 Aug 2019 488th lissitz 733 45 10ms 27 Apr 2020 488th synchromic 733 45 11ms 8 May 2020 488th dsntzn 🇸🇰 733 45 10ms 13 Aug 2020 488th Zkrgu 733 45 10ms 12 Dec 2020 488th underdude 733 45 10ms 7 Jan 2021 488th elizj3 🇵🇱 733 45 12ms 26 Jun 2021 488th garrisonhh 733 45 10ms 9 Oct 2021 488th HenryTy83 733 45 10ms 4 Dec 2022 488th jorbDehmel 🇺🇸 733 45 10ms 7 Apr 2023 488th adamnielson42 🇺🇸 733 45 10ms 24 Apr 2023 488th raszpi 🇭🇺 733 45 10ms 1 Sep 2023 488th yuchuehw 733 45 10ms 1 Jan 2024 488th kydogia 733 45 10ms 28 Mar 2024 488th Voltrifrodec 🇸🇰 733 45 12ms 25 Nov 2025 488th Pyroan 733 45 10ms 9 days ago 488th TommyP92 733 45 9ms 4 days ago 508th skagget77 717 46 11ms 10 Oct 2017 508th Erutuon 717 46 10ms 21 Feb 2018 508th OmegaB0t 717 46 9ms 19 Apr 2018 508th anananlyjlyj 717 46 11ms 4 Jul 2018 508th dieckie 717 46 10ms 28 Feb 2019 508th arntj 717 46 13ms 13 Apr 2019 508th Ranner198 717 46 10ms 15 Nov 2019 508th dijs 717 46 10ms 5 Dec 2019 508th Kauhentus 717 46 11ms 7 Dec 2019 508th unoctium1 717 46 10ms 14 Dec 2019 508th vonKrafft 717 46 10ms 25 Mar 2020 508th jcheritat 717 46 11ms 6 Sep 2020 508th jcsawyer123 717 46 10ms 17 Sep 2020 508th godraadam 717 46 10ms 13 Apr 2021 508th Y0UR-U5ERNAME 717 46 10ms 3 Sep 2021 508th ethandhunt 717 46 10ms 19 Sep 2021 508th martinnorling 🇸🇪 717 46 10ms 8 Feb 2022 508th sebmandal 717 46 12ms 10 May 2022 508th C0de5mith 🇺🇸 717 46 10ms 3 Aug 2022 508th Ephellon 717 46 9ms 4 Dec 2022 508th olivermrose 🇺🇸 717 46 10ms 17 Jan 2023 508th eiburns 717 46 10ms 9 Oct 2023 508th loganmacdougall 🇨🇦 717 46 12ms 19 Jan 2024 508th Jaro32768 🇸🇰 717 46 9ms 8 Feb 2024 508th Palladium02 717 46 11ms 4 May 2025 508th kellantech 717 46 11ms 17 Dec 2025 534th Kladdkaka 702 47 9ms 9 Feb 2018 534th HippasusSurd 702 47 9ms 25 Mar 2018 534th sgtdck 702 47 11ms 16 Oct 2018 534th NotGate 702 47 10ms 21 Jan 2019 534th Cortan122 702 47 11ms 26 Feb 2019 534th shayded-exe 702 47 11ms 10 Apr 2019 534th Jooraz 702 47 13ms 12 May 2019 534th nkansal96 702 47 9ms 21 May 2019 534th JustinDowty 702 47 10ms 12 Jun 2020 534th Juici 702 47 10ms 17 Sep 2020 534th berenteb 🇭🇺 702 47 10ms 11 Dec 2020 534th flowernal 702 47 9ms 25 Dec 2020 534th lukalotl 702 47 10ms 24 May 2021 534th Breadballs 702 47 10ms 1 Dec 2021 534th Domicnt 702 47 10ms 2 Jan 2022 534th Mednoob 702 47 12ms 8 Sep 2022 534th ShiraJoseph 🇺🇸 702 47 12ms 26 Feb 2023 534th KjeldSchmidt 702 47 12ms 23 Apr 2023 534th bryanmytko 702 47 10ms 7 Sep 2023 534th Seis 702 47 10ms 14 May 2024 534th heanyang1 702 47 10ms 22 Apr 2025 534th timothytomato 702 47 12ms 26 May 2025 534th Florian-Pubert 702 47 10ms 25 Jun 2025 534th jacekwladzinski 702 47 11ms 2 Oct 2025 534th johnkiernander 702 47 11ms 12 Dec 2025 559th jsoendermann 688 48 11ms 13 Dec 2017 559th belkamax05 688 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