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
Algorithms
7
Arrays
1
Binary
17
Bits
2
Ciphers
1
Cryptography
1
Fundamentals
7
Mathematics
2
Networks
1
Parsing
2
Performance
2
Puzzles
2
Regular Expressions
1
Strings
17
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
17 Kata Found
6 kyu
Parity bit - Error detecting code
1,007
pshp
Algorithms
Binary
Strings
Fundamentals
6 kyu
Thue-Morse Sequence
817
SandQueen
Strings
Binary
Algorithms
5 kyu
Base64 Encoding
5,388
joseph.varnado
2 Issues Reported
Binary
Strings
Algorithms
6 kyu
Binary to Text (ASCII) Conversion
5,609
deanvn
4 Issues Reported
Binary
Strings
Fundamentals
7 kyu
Regexp Basics - is it a eight bit signed number?
1,028
taw
3 Issues Reported
Bits
Binary
Strings
Regular Expressions
Fundamentals
5 kyu
Ookkk, Ok, O? Ook, Ok, Ooo!
696
ZozoFouchtra
1 Issue Reported
Strings
Binary
Puzzles
6 kyu
Grill it!
1,347
dcieslak
Strings
Binary
Fundamentals
5 kyu
ASCII85 Encoding & Decoding
1,358
delfuego
7 Issues Reported
Binary
Strings
Algorithms
7 kyu
Password Check - Binary to String
1,544
user261601
Binary
Strings
Arrays
Fundamentals
8 kyu
Stringy Strings
39,984
andrewMacmurray
2 Issues Reported
Strings
Binary
Algorithms
6 kyu
Proquints: Pro-nouncable Quint-uplets
77
stellartux
Strings
Parsing
Binary
4 kyu
Binary with unknown bits: average to binary
28
LanXnHn
Mathematics
Binary
Performance
Strings
Puzzles
7 kyu
Binary to string
1,049
user889396
Binary
Strings
Fundamentals
6 kyu
Binary with an unknown bit: average to binary (Simple Version)
32
LanXnHn
1 Issue Reported
Binary
Strings
Performance
Mathematics
6 kyu
IP Address to Number
2,034
user5854572
Strings
Binary
Networks
Fundamentals
5 kyu
Morse Encoding
1,242
constablebrew
2 Issues Reported
Bits
Strings
Binary
Parsing
Algorithms
7 kyu
Bitty Words
212
Austin Haws
1 Issue Reported
Strings
Binary
Algorithms
Ciphers
Cryptography
Confirm
Collect:
undefined
Loading collection data...