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 553rd LakeThomason 688 48 9ms 1 Jun 2021 553rd hymanimy 688 48 10ms 27 Jul 2021 553rd delgoodie 688 48 9ms 19 Oct 2021 553rd CutOffFrequency 688 48 12ms 31 Oct 2022 553rd Weston49 688 48 11ms 11 Dec 2022 553rd Baxi-codes 688 48 9ms 25 Dec 2022 553rd fkantelberg 688 48 8ms 15 Jul 2023 553rd Posandu 688 48 9ms 23 Sep 2023 553rd azure-blondon 688 48 10ms 15 Jul 2024 553rd abhishekg999 688 48 9ms 21 Sep 2024 553rd gigaprofisi 🇺🇸 688 48 8ms 5 Nov 2025 572nd ArturLange 673 49 8ms 31 Aug 2018 572nd felixpackard 673 49 9ms 16 Mar 2020 572nd hvanderdys 673 49 9ms 10 Sep 2020 572nd stadamdoki 673 49 9ms 12 Apr 2021 572nd cubedhuang 673 49 9ms 23 Mar 2022 572nd cmoedk 673 49 9ms 5 Nov 2022 572nd Florian-Mt 673 49 9ms 20 Nov 2023 572nd SrGalletaEXT 673 49 9ms 22 Jul 2024 572nd xShadowBlade 673 49 9ms 24 Nov 2024 572nd Charlie85270 673 49 9ms 25 Jun 2025 582nd petewritescode 660 50 9ms 14 Dec 2018 582nd rzhade3 660 50 9ms 22 May 2020 582nd taimanh229 660 50 9ms 31 Dec 2020 582nd MichalMarsalek 🇨🇿 660 50 9ms 29 Nov 2021 582nd fitzdotlol 🇺🇸 660 50 9ms 18 Feb 2022 582nd Bonjour27891 🇻🇳 660 50 10ms 12 Mar 2022 582nd jlivas 660 50 9ms 1 Jul 2022 582nd tse-jp 🇯🇵 660 50 9ms 30 Nov 2022 582nd tuxillator 660 50 9ms 15 Dec 2022 582nd lucipas 660 50 9ms 8 May 2024 582nd Vexxter9 🇳🇱 660 50 10ms 20 Sep 2024 582nd allistersascha 660 50 9ms 11 Oct 2024 582nd Dddatt 660 50 9ms 9 Jan 2025 582nd Zach1031 660 50 8ms 15 Nov 2025 582nd Pyroan 660 50 9ms 17 Dec 2025 597th genius257 647 51 10ms 23 Mar 2018 597th stanley-c-so 647 51 11ms 4 Oct 2019 597th Jumprocks1 647 51 9ms 11 Feb 2020 597th jn-lp 🇺🇦 647 51 10ms 31 Oct 2020 597th RedstoneTim 647 51 9ms 26 Jun 2021 597th rdscott-vrsk 647 51 9ms 12 May 2023 597th Ralac07 🇦🇺 647 51 9ms 18 Apr 2025 604th bobesa 635 52 26ms 16 Oct 2017 604th xen-the 635 52 10ms 10 Oct 2018 604th Caylyn 635 52 9ms 22 Dec 2018 604th joeytwiddle 635 52 36ms 4 Feb 2019 604th phillygogo 635 52 10ms 5 Jun 2019 604th wouterraateland 635 52 10ms 8 Jul 2019 604th pg98 635 52 10ms 4 Sep 2019 604th paavohuhtala 635 52 25ms 4 Jan 2020 604th jankaifer 635 52 25ms 8 Aug 2020 604th lowlighter 635 52 25ms 30 Oct 2020 604th 102 635 52 9ms 18 Nov 2020 604th arrudagates 635 52 24ms 23 Jun 2021 604th teofum 635 52 24ms 8 Mar 2022 604th mamamia5x 635 52 40ms 8 Mar 2024 604th junkondo-jp 635 52 56ms 6 May 2024 604th Sinescape 635 52 9ms 16 Sep 2024 604th shandriy 635 52 26ms 23 Jan 2026 621st johnennewdeeson 623 53 9ms 16 Oct 2017 621st someone12346 623 53 25ms 1 Apr 2018 621st gunnermanx 623 53 9ms 4 Jan 2019 621st frankviktorfrank 623 53 9ms 26 Mar 2019 621st gjbianco 623 53 25ms 27 May 2019 621st dzablo 623 53 26ms 4 Sep 2019 621st adoxography 623 53 24ms 16 Sep 2019 621st quentincaffeino 623 53 26ms 4 Jun 2020 621st jchitel 623 53 25ms 24 Sep 2020 621st ffflorian 623 53 26ms 23 Nov 2020 621st IAmYhvr 623 53 26ms 6 Feb 2021 621st gnlow 🇰🇷 623 53 55ms 15 Feb 2021 621st ForkKILLET 🇨🇳 623 53 26ms 18 Feb 2021 621st PGPereira 623 53 26ms 27 Mar 2021 621st PlutonianHacker 623 53 10ms 9 Jul 2021 621st ereztaiar 🇮🇱 623 53 56ms 12 Aug 2021 621st lukaskairys 623 53 25ms 27 Sep 2021 621st Clonex 623 53 25ms 23 Nov 2021 621st janleigh 🇵🇭 623 53 9ms 31 May 2022 621st MiguelEXE 623 53 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