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
18
Algebra
3
Algorithms
149
Arrays
179
Asynchronous
1
Big Integers
2
Binary
8
Bits
5
Ciphers
8
Combinatorics
3
Cryptography
9
Data Frames
1
Data Science
2
Data Structures
47
Date Time
6
Design Patterns
1
Dynamic Programming
1
Esoteric Languages
2
Functional Programming
19
Fundamentals
805
Game Solvers
1
Games
8
Genetic Algorithms
1
Geometry
4
Interpreters
4
Language Features
1
Lists
19
Logic
39
Logic Programming
1
Mathematics
68
Matrix
3
Metaprogramming
2
MongoDB
1
Networks
2
Number Theory
2
Object-oriented Programming
5
Parsing
32
Performance
2
Permutations
6
Puzzles
22
Queues
1
Recursion
3
Refactoring
1
Regular Expressions
128
Restricted
9
Riddles
1
SQL
7
Security
2
Simulation
3
Sorting
22
Statistics
1
Strings
805
Trees
1
Tutorials
2
Unicode
2
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
805 Kata Found
6 kyu
Detect Pangram
199,267
anindyabd
4 Issues Reported
Strings
Data Structures
Fundamentals
8 kyu
Crash Override
10,488
Peter Rhodes
Strings
Fundamentals
7 kyu
Initialize my name
5,318
manonacodingmission
Strings
Fundamentals
6 kyu
Binary to Text (ASCII) Conversion
5,722
deanvn
4 Issues Reported
Binary
Strings
Fundamentals
7 kyu
EAN Validation
2,847
SithFire
Algorithms
Fundamentals
Mathematics
Strings
7 kyu
Expand a String Based on Alphabet Position
87
m0hc33n
1 Issue Reported
Strings
Algorithms
Fundamentals
Arrays
Parsing
7 kyu
Reverse words
159,151
jnicol
2 Issues Reported
Strings
Fundamentals
7 kyu
Jenny the youngest detective
2,803
veredrec
Strings
Arrays
Algorithms
Fundamentals
8 kyu
Remove First and Last Character
317,316
Steadyx
3 Issues Reported
Strings
Fundamentals
7 kyu
String Scramble
3,690
Dragoris
1 Issue Reported
Fundamentals
Strings
Arrays
6 kyu
Catalog
3,013
g964
1 Issue Reported
Fundamentals
Strings
Beta
Make sets
12
Teaminds
1 Issue Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
7 kyu
Strings
Arrays
Fundamentals
8 kyu
Sum Mixed Array
110,040
PG1
1 Issue Reported
Fundamentals
Strings
Arrays
Beta
Too many reversals
26
smerdyakov-moi
Status:
Testing & feedback needed
Estimated Rank:
8 kyu
Fundamentals
Strings
7 kyu
Exclamation marks series #5: Remove all exclamation marks from the end of words
4,673
myjinxin2015
Strings
Regular Expressions
Fundamentals
7 kyu
esrever esreveR!
1,324
Caders
1 Issue Reported
Fundamentals
Strings
8 kyu
Correct the mistakes of the character recognition software
68,083
denesnori
2 Issues Reported
Fundamentals
Strings
7 kyu
Borrower Speak
3,608
PG1
3 Issues Reported
Fundamentals
Strings
7 kyu
Driving Licence
4,353
adrian.eyre
4 Issues Reported
Strings
Arrays
Fundamentals
6 kyu
Parity bit - Error detecting code
1,037
pshp
Algorithms
Binary
Strings
Fundamentals
7 kyu
Genetic Algorithm Series - #1 Generate
3,745
gabrielsiedler
2 Issues Reported
Strings
Fundamentals
Genetic Algorithms
Algorithms
7 kyu
Help the Fruit Guy
8,117
user3028132
3 Issues Reported
Arrays
Strings
Fundamentals
7 kyu
Digits explosion
18,789
angellaa
Strings
Regular Expressions
Fundamentals
7 kyu
Baby shark lyrics generator
2,884
albertogcmr
1 Issue Reported
Strings
Lists
Fundamentals
Restricted
6 kyu
Simple Simple Simple String Expansion
3,943
alansun
1 Issue Reported
Strings
Regular Expressions
Fundamentals
8 kyu
Remove exclamation marks
130,207
wichu
2 Issues Reported
Fundamentals
Strings
8 kyu
Convert a Boolean to a String
250,470
btaitelb
Strings
Fundamentals
7 kyu
Case-sensitive!
1,952
riyakayal
Strings
Fundamentals
7 kyu
SQL: Concatenating Columns
14,112
PG1
Fundamentals
Strings
SQL
8 kyu
All Star Code Challenge #18
80,693
shaddyjr
Fundamentals
Strings
Loading...
Confirm
Collect:
undefined
Loading collection data...