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
17
Arrays
2
Ciphers
2
Cryptography
1
Fundamentals
4
Logic
1
Puzzles
2
Regular Expressions
17
Security
1
Strings
13
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
17 Kata Found
5 kyu
ISBN-10 Validation
11,366
nklein
4 Issues Reported
Regular Expressions
Algorithms
5 kyu
Return substring instance count - 2
3,165
ineiti
2 Issues Reported
Strings
Regular Expressions
Algorithms
7 kyu
Password validator
8,174
tdowek1
1 Issue Reported
Fundamentals
Regular Expressions
Algorithms
6 kyu
Valid Phone Number
20,607
xDranik
3 Issues Reported
Regular Expressions
Algorithms
6 kyu
Convert string to camel case
203,635
jhoffner
20 Issues Reported
Regular Expressions
Algorithms
Strings
7 kyu
Remove consecutive duplicate words
7,751
e.mihaylin
Strings
Regular Expressions
Algorithms
6 kyu
Trumpness detector
1,140
GiacomoSorbi
3 Issues Reported
Regular Expressions
Strings
Algorithms
5 kyu
ROT13
28,561
hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Generic numeric template formatter
1,327
GiacomoSorbi
1 Issue Reported
Regular Expressions
Strings
Algorithms
2 kyu
Regular Expression - Check if divisible by 0b111 (7)
2,255
Hacker Sakana
Puzzles
Regular Expressions
Strings
Algorithms
6 kyu
Remove the parentheses
7,260
topping
2 Issues Reported
Strings
Algorithms
Regular Expressions
Fundamentals
6 kyu
Encrypt this!
23,541
suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security
6 kyu
IP Validation
43,362
wink
5 Issues Reported
Regular Expressions
Algorithms
6 kyu
Create Phone Number
349,056
xDranik
Arrays
Strings
Regular Expressions
Algorithms
6 kyu
Evaluate the Group of Parentheses
539
saudiGuy
Algorithms
Logic
Regular Expressions
Strings
1 kyu
Regular Expression for Binary Numbers Divisible by n
1,220
hufftheweevil
6 Issues Reported
Algorithms
Puzzles
Regular Expressions
Strings
6 kyu
Convert ISBN-10 to ISBN-13
1,115
dienesviktor
Algorithms
Regular Expressions
Fundamentals
Strings
Confirm
Collect:
undefined
Loading collection data...