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
2
Algorithms
86
Arrays
86
Binary
1
Bits
2
Ciphers
1
Cryptography
3
Data Science
1
Data Structures
17
Functional Programming
15
Fundamentals
34
Games
5
Lists
2
Logic
5
Mathematics
1
Matrix
1
Object-oriented Programming
1
Parsing
6
Performance
1
Puzzles
5
Recursion
2
Regular Expressions
10
Security
2
Sorting
6
Statistics
1
Streams
1
Strings
86
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
86 Kata Found
5 kyu
Four Letter Words ~ Mutations
678
rowcased
Strings
Arrays
Games
Parsing
Algorithms
6 kyu
Coding Meetup #10 - Higher-Order Functions Series - Create usernames
3,488
PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
7 kyu
Multiply Word in String
4,934
ArmandLluka
1 Issue Reported
Strings
Algorithms
Fundamentals
Arrays
7 kyu
Coding Meetup #4 - Higher-Order Functions Series - Find the first Python developer
10,352
PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
Regular Expressions
7 kyu
Coding Meetup #2 - Higher-Order Functions Series - Greet developers
12,815
PiotrBerebecki
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
7 kyu
Coding Meetup #1 - Higher-Order Functions Series - Count the number of JavaScript developers coming from Europe
16,559
PiotrBerebecki
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
6 kyu
Name to Matrix
1,016
Coder_38
1 Issue Reported
Strings
Arrays
Algorithms
Matrix
7 kyu
Coding Meetup #3 - Higher-Order Functions Series - Is Ruby coming?
11,103
PiotrBerebecki
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
7 kyu
2 DNAs sequences, coding for same protein?
433
nbeck
1 Issue Reported
Strings
Algorithms
Arrays
6 kyu
I love big nums and I cannot lie
845
joh_pot
1 Issue Reported
Strings
Arrays
Algorithms
7 kyu
Determine if the poker hand is flush
6,307
CodingWarrior
1 Issue Reported
Arrays
Algorithms
Logic
Strings
Games
7 kyu
What is my name score? #1
1,309
manonacodingmission
1 Issue Reported
Strings
Arrays
Algorithms
6 kyu
String Suffixes
1,276
debri
Strings
Logic
Arrays
Algorithms
6 kyu
String array duplicates
8,505
KenKamau
1 Issue Reported
Strings
Arrays
Algorithms
6 kyu
Remember
1,311
debri
2 Issues Reported
Logic
Strings
Arrays
Algorithms
6 kyu
Longest palindrome
1,430
georgesykes86
2 Issues Reported
Arrays
Strings
Algorithms
7 kyu
Make a square box!
2,123
user2514386
Strings
Arrays
ASCII Art
Algorithms
Beta
Top Secret Deciphering Mission
9
TehCupcakes
1 Issue Reported
Status:
Testing & feedback needed
Estimated Rank:
5 kyu
Strings
Arrays
Games
Algorithms
Puzzles
7 kyu
The Raul Kata
140
user5036852
Algorithms
Strings
Arrays
Fundamentals
6 kyu
Braille Reader
131
Detecter
2 Issues Reported
Arrays
Strings
Algorithms
6 kyu
Convert SQL Query Output to CSV
78
GrahamD
Strings
Arrays
Algorithms
Data Science
5 kyu
Simple Encryption #2 - Index-Difference
885
user5036852
Fundamentals
Cryptography
Security
Strings
Arrays
Algorithms
6 kyu
Millipede of words
906
RealSup
Algorithms
Arrays
Strings
6 kyu
Sort the columns of a csv-file
1,074
user5036852
Strings
Arrays
Algorithms
Sorting
5 kyu
Is the King in check ?
1,471
trashy_incel
Games
Arrays
Strings
Algorithms
6 kyu
Calculate String Rotation
7,496
obnounce
Strings
Arrays
Algorithms
6 kyu
Simple Encryption #1 - Alternating Split
29,817
user5036852
3 Issues Reported
Cryptography
Algorithms
Strings
Arrays
Fundamentals
6 kyu
Encrypt this!
23,719
suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security
6 kyu
Create Phone Number
352,461
xDranik
Arrays
Strings
Regular Expressions
Algorithms
6 kyu
Alex & snooker: scores.
321
nekokat
1 Issue Reported
Statistics
Arrays
Strings
Algorithms
Loading...
Confirm
Collect:
undefined
Loading collection data...