Kata Library: C Practice
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
4
Arrays
6
Ciphers
1
Cryptography
1
Fundamentals
28
Lists
1
Regular Expressions
28
Security
1
Strings
19
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
28 Kata Found
5 kyu
Alphabet wars - nuclear strike
1,737
dcieslak
Strings
Regular Expressions
Fundamentals
7 kyu
Password validator
8,212
tdowek1
1 Issue Reported
Fundamentals
Regular Expressions
Algorithms
8 kyu
String cleaning
28,058
mkelty
Regular Expressions
Fundamentals
Strings
7 kyu
Remove anchor from URL
48,678
jhoffner
2 Issues Reported
Regular Expressions
Strings
Fundamentals
6 kyu
The Vowel Code
21,752
yaphi1
1 Issue Reported
Arrays
Strings
Regular Expressions
Fundamentals
7 kyu
The Ladies of ENIAC
1,834
nogainbar
Strings
Regular Expressions
Fundamentals
6 kyu
Look and say sequence generator
867
GiacomoSorbi
1 Issue Reported
Strings
Regular Expressions
Fundamentals
7 kyu
C.Wars
4,499
debri
Strings
Regular Expressions
Fundamentals
6 kyu
Last Survivors Ep.2
2,210
Schulzkafer
1 Issue Reported
Fundamentals
Arrays
Regular Expressions
7 kyu
Find the longest gap!
3,132
joh_pot
Regular Expressions
Strings
Fundamentals
7 kyu
Ghostbusters (whitespace removal)
5,565
bencoullie
Fundamentals
Regular Expressions
Strings
6 kyu
Remove the parentheses
7,271
topping
2 Issues Reported
Strings
Algorithms
Regular Expressions
Fundamentals
7 kyu
Regex validate PIN code
185,835
JMurphyWeb
1 Issue Reported
Regular Expressions
Fundamentals
7 kyu
Digits explosion
18,333
angellaa
Strings
Regular Expressions
Fundamentals
8 kyu
Simple validation of a username with regex
23,742
daymos
1 Issue Reported
Regular Expressions
Fundamentals
6 kyu
Encrypt this!
23,572
suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security
7 kyu
Disemvowel Trolls
375,687
osuushi
4 Issues Reported
Strings
Regular Expressions
Fundamentals
6 kyu
Count the smiley faces!
101,085
St3f4n
5 Issues Reported
Regular Expressions
Fundamentals
6 kyu
Dashatize it
15,262
Dragoris
Strings
Arrays
Regular Expressions
Fundamentals
7 kyu
Replace all items
3,783
wichu
3 Issues Reported
Fundamentals
Arrays
Lists
Regular Expressions
7 kyu
L2: Triple X
5,004
Swolebrain
Strings
Regular Expressions
Fundamentals
7 kyu
Dropcaps
3,808
debri
1 Issue Reported
Arrays
Strings
Regular Expressions
Fundamentals
6 kyu
Cancer cells
800
smolen
Regular Expressions
Fundamentals
6 kyu
Convert ISBN-10 to ISBN-13
1,116
dienesviktor
Algorithms
Regular Expressions
Fundamentals
Strings
7 kyu
Valid number to 2 decimal places
1,306
JMurphyWeb
1 Issue Reported
Regular Expressions
Fundamentals
6 kyu
Simple String Find with Regex
59
roswold
Regular Expressions
Fundamentals
6 kyu
How much Wood?
98
mochman
Fundamentals
Regular Expressions
Strings
7 kyu
Identify Case
576
narayanswa30663
6 Issues Reported
Strings
Regular Expressions
Fundamentals
Confirm
Collect:
undefined
Loading collection data...