Kata Library
Sign Up
Time to claim your honor
Training
Practice
Complete challenging
Kata
to earn honor and ranks. Re-train to hone technique
Freestyle Sparring
Take turns remixing and refactoring others code through
Kumite
Community
Leaderboards
Achieve honor and move up the global leaderboards
Chat
Join our
Discord
server and chat with your fellow code warriors
Discussions
View our
Github Discussions
board to discuss general Codewars topics
About
Docs
Learn about all of the different aspects of Codewars
Blog
Read the latest news from Codewars and the community
Log In
Sign Up
Library
Collections
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Hardest
Easiest
Name
Relevance
Low Satisfaction
All
My Languages
Agda (Beta)
BF (Beta)
C
CFML (Beta)
Clojure
COBOL (Beta)
CoffeeScript
CommonLisp (Beta)
Coq
C++
Crystal
C#
D (Beta)
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy
Haskell
Haxe (Beta)
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin
λ Calculus (Beta)
Lean
Lua
NASM
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
Pascal (Beta)
Perl (Beta)
PHP
PowerShell (Beta)
Prolog (Beta)
PureScript (Beta)
Python
R (Beta)
Racket
Raku (Beta)
Reason (Beta)
RISC-V (Beta)
Ruby
Rust
Scala
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Approved & Beta
Approved
Beta
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
8 kyu
easiest
7 kyu
6 kyu
5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
ASCII Art
9
Algebra
7
Algorithms
456
Arrays
1118
Binary
13
Binary Search Trees
1
Binary Trees
2
Bits
7
Cellular Automata
1
Ciphers
3
Combinatorics
5
Cryptography
3
Data Science
6
Data Structures
63
Date Time
5
Debugging
7
Design Patterns
1
Dynamic Programming
5
Esoteric Languages
4
Filtering
5
Functional Programming
40
Fundamentals
656
Game Solvers
3
Games
58
Genetic Algorithms
2
Geometry
9
Graph Theory
6
Graphics
3
Image Processing
2
Interpreters
4
Iterators
2
JSON
1
Language Features
4
Linear Algebra
4
Lists
89
Logic
43
Macros
1
Mathematics
92
Matrix
32
Memoization
1
Metaprogramming
1
Number Theory
3
Object-oriented Programming
13
Parsing
4
Performance
40
Permutations
5
Physics
2
Probability
2
Puzzles
71
Queues
2
Recursion
28
Refactoring
5
Regular Expressions
32
Restricted
7
Searching
3
Security
2
Sets
5
Simulation
1
Sorting
88
Statistics
6
Streams
1
Strings
230
Trees
2
Tutorials
5
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
1,118 Kata Found
7 kyu
Friday the 13th Part 1
1,359
BurstNova
2 Issues Reported
Fundamentals
Arrays
5 kyu
Divide and maximize
268
AveragePythonEnjoyer
1 Issue Reported
Puzzles
Lists
Arrays
Mathematics
6 kyu
Mexican Wave
73,593
adrian.eyre
3 Issues Reported
Arrays
Strings
Fundamentals
6 kyu
Hyper Sphere
2,226
CrowdHailer
Mathematics
Arrays
Fundamentals
8 kyu
Count of positives / sum of negatives
161,085
Dentzil
10 Issues Reported
Fundamentals
Arrays
Lists
8 kyu
Sort and Star
52,051
PG1
2 Issues Reported
Fundamentals
Strings
Arrays
Sorting
8 kyu
Is there a vowel in there?
15,627
PG1
2 Issues Reported
Fundamentals
Strings
Arrays
7 kyu
Array Array Array
4,511
PG1
Fundamentals
Strings
Arrays
5 kyu
Mean Square Error
22,208
kylehill
Arrays
Mathematics
Algorithms
8 kyu
Printing Array elements with Comma delimiters
29,775
Javatlacati
4 Issues Reported
Arrays
Fundamentals
6 kyu
Pine's Deaf Grandma
454
srMarquinho
Strings
Arrays
Fundamentals
8 kyu
Sum Arrays
199,184
richardhsu
3 Issues Reported
Arrays
Fundamentals
7 kyu
The 'spiraling' box
1,938
brodiemark
1 Issue Reported
Arrays
Fundamentals
6 kyu
Frequency Analysis With Buckets
635
ajLapid718
2 Issues Reported
Fundamentals
Arrays
Sorting
6 kyu
Create a frame!
1,673
gabrielsiedler
Strings
Arrays
ASCII Art
Fundamentals
7 kyu
Unique(ish)
111
ReganRyanNZ
Arrays
Fundamentals
5 kyu
Interleaving Arrays
2,101
arlaneenalra
Algorithms
Arrays
6 kyu
Alex & snooker: points earned.
330
nekokat
1 Issue Reported
Strings
Arrays
7 kyu
Return a string's even characters.
8,249
tu6619
Fundamentals
Strings
Arrays
7 kyu
nova polynomial 4. derivative
378
hgamboa
1 Issue Reported
Algorithms
Recursion
Arrays
6 kyu
Flip Your Stack (of Pancakes)
523
brodiemark
Arrays
Sorting
7 kyu
Pernicious Numbers
684
AcesOfGlory
2 Issues Reported
Arrays
Binary
Algorithms
7 kyu
Chinese Zodiac
2,190
AcesOfGlory
Fundamentals
Arrays
7 kyu
Name Array Capping
8,740
ogryzek
1 Issue Reported
Strings
Arrays
Fundamentals
7 kyu
Partial Word Searching
8,095
obnounce
4 Issues Reported
Arrays
Strings
Fundamentals
6 kyu
Points On A Line
1,569
prksingh
1 Issue Reported
Arrays
Geometry
Fundamentals
7 kyu
Filter unused digits
6,199
sunboshan
1 Issue Reported
Fundamentals
Filtering
Arrays
7 kyu
Latin Squares
2,133
brodiemark
Arrays
7 kyu
Is every value in the array an array?
5,123
Peter Rhodes
1 Issue Reported
Arrays
Fundamentals
6 kyu
Name to Matrix
972
Coder_38
1 Issue Reported
Strings
Arrays
Algorithms
Matrix
Loading...
Confirm
Collect:
undefined
Loading collection data...