Kata
Sign Up
Kata
Kumite
Forum
Wiki
Leaders
Log In
Sign Up
Library
Collections
Sort by:
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Recently Published
Hardest
Easiest
Name
Language:
All
My Languages
Agda (Beta)
BF (Beta)
C
Clojure
CoffeeScript
Coq (Beta)
C++
Crystal
C#
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy (Beta)
Haskell
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin (Beta)
Lua (Beta)
NASM (Beta)
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
PHP
PowerShell (Beta)
PureScript (Beta)
Python
R (Beta)
Racket (Beta)
Reason (Beta)
Ruby
Rust
Scala (Beta)
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Status:
Approved & Beta
Approved
Beta
Progress:
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
Difficulty:
8 kyu
8 kyu
7 kyu
7 kyu
6 kyu
6 kyu
5 kyu
5 kyu
4 kyu
4 kyu
3 kyu
3 kyu
2 kyu
2 kyu
1 kyu
1 kyu
Tags:
Fundamentals (4002)
Algorithms (2956)
Data Types (2424)
Logic (2147)
Numbers (1273)
Strings (1167)
Puzzles (1157)
Arrays (1011)
Games (977)
Mathematics (969)
Basic Language Features (838)
Programming Paradigms (791)
Data Structures (567)
Control Flow (551)
Declarative Programming (488)
Advanced Language Features (345)
Regular Expressions (263)
Object-oriented Programming (242)
Functions (210)
Lists (208)
Functional Programming (173)
Arithmetic (170)
Loops (167)
Objects (141)
Bugs (131)
Data (126)
Algebra (125)
Theoretical Computer Science (114)
Security (111)
Performance (110)
Sorting (105)
Parsing (103)
Computability Theory (100)
Recursion (100)
Binary (95)
Classes (95)
Integers (93)
Optimization (91)
Utilities (86)
Cryptography (85)
Geometry (85)
Databases (83)
Information Systems (83)
SQL (81)
Graphs (79)
Dates/Time (73)
Sequences (64)
Design Principles (61)
Design Patterns (59)
Formatting (51)
992 Kata Found
7 kyu
Sort by Last Char
50
50
11
90%
of
364
1,896
A.Partridge
Fundamentals
Strings
Arrays
Functions
Control Flow
Basic Language Features
8 kyu
The 'if' function
119
119
31
70%
of
879
9,037
user578387
3 Issues Reported
Fundamentals
Functional Programming
Declarative Programming
Higher-order Functions
Functions
Control Flow
Basic Language Features
6 kyu
Vowels Back
32
32
6
84%
of
110
433
A.Partridge
1 Issue Reported
Algorithms
Fundamentals
Strings
Arrays
Loops
Control Flow
Basic Language Features
7 kyu
Sum of odd numbers
966
966
169
84%
of
5,322
38,268
hhelwich
Fundamentals
Arrays
Lists
Data Structures
Numbers
Arithmetic
Mathematics
Algorithms
4 kyu
Sum of Intervals
494
494
105
91%
of
1,023
7,355
xDranik
2 Issues Reported
Algorithms
Aggregations
Arithmetic
Mathematics
Numbers
Integers
3 kyu
Alphametics Solver
120
120
28
94%
of
25
97
docgunthrop
Algorithms
Puzzles
Games
Performance
Optimization
Cryptography
Security
4 kyu
Square into Squares. Protect trees!
1135
1135
175
93%
of
749
4,322
g964
Fundamentals
Mathematics
Algorithms
Numbers
Sequences
Arrays
6 kyu
The Supermarket Queue
1625
1625
347
93%
of
2,566
14,217
mattlub
Fundamentals
Arrays
Loops
Control Flow
Basic Language Features
6 kyu
Tetris Series #2 — Primitive Gameplay
10
10
1
95%
of
20
50
Etoneja
Fundamentals
Games
Algorithms
Basic Language Features
Loops
Control Flow
Arrays
6 kyu
Build a pile of Cubes
1210
1210
147
85%
of
4,722
32,906
g964
1 Issue Reported
Fundamentals
Optimization
6 kyu
Create Phone Number
619
619
186
82%
of
6,218
56,080
xDranik
Algorithms
Arrays
Strings
Loops
Control Flow
Basic Language Features
Fundamentals
Formatting
Regular Expressions
Declarative Programming
Advanced Language Features
5 kyu
Master your primes: sieve with memoization
26
26
12
82%
of
25
69
GiacomoSorbi
1 Issue Reported
Algorithms
Memoization
Design Patterns
Design Principles
Optimization
8 kyu
Yield to the Block
28
28
3
89%
of
95
2,461
agram
1 Issue Reported
Fundamentals
Blocks
Object-oriented Programming
Functions
Control Flow
Basic Language Features
Functional Programming
Declarative Programming
Higher-order Functions
5 kyu
Integers: Recreation One
914
914
163
88%
of
1,545
9,919
g964
Fundamentals
Algorithms
Optimization
6 kyu
Tribonacci Sequence
1155
1155
228
88%
of
7,349
49,022
GiacomoSorbi
3 Issues Reported
Fundamentals
Sequences
Arrays
Arithmetic
Mathematics
Algorithms
Numbers
Lists
Data Structures
7 kyu
Descending Order
823
823
145
88%
of
8,511
62,898
TastyOs
1 Issue Reported
Fundamentals
Functions
Control Flow
Basic Language Features
6 kyu
Find last Fibonacci digit [hardcore version]
23
23
7
93%
of
115
377
GiacomoSorbi
Algorithms
Sequences
Arrays
Parsing
Strings
6 kyu
Save the Spice Harvester (Dune Universe)
27
27
12
92%
of
130
403
docgunthrop
Fundamentals
Arithmetic
Mathematics
Algorithms
Numbers
7 kyu
Testing 1-2-3
54
54
11
95%
of
1,183
4,919
acr
Fundamentals
Arrays
Iterators
Control Flow
Object-oriented Programming
Basic Language Features
4 kyu
Sum Strings as Numbers
745
745
96
82%
of
1,764
12,943
nicknovitski
5 Issues Reported
Algorithms
Strings
Arithmetic
Mathematics
Numbers
Big Integers
Integers
Utilities
4 kyu
How many numbers III?
344
344
59
94%
of
242
1,147
raulbc777
1 Issue Reported
Fundamentals
Data Structures
Algorithms
Control Flow
Basic Language Features
Mathematics
Numbers
Declarative Programming
7 kyu
Sum of Cubes
26
26
8
90%
of
450
2,918
MementoMori
Fundamentals
Control Flow
Basic Language Features
7 kyu
The PaperFold sequence
31
31
19
87%
of
55
245
JohanWiltink
Algorithms
Sequences
Arrays
Numbers
7 kyu
The Baum-Sweet sequence
18
18
5
87%
of
59
206
JohanWiltink
Algorithms
Sequences
Arrays
Numbers
6 kyu
Longest palindrome
29
29
9
90%
of
93
319
georgesykes86
Algorithms
Loops
Control Flow
Basic Language Features
Fundamentals
Arrays
Strings
6 kyu
Look and say sequence generator
29
29
6
95%
of
107
327
GiacomoSorbi
Fundamentals
Sequences
Arrays
Constructors
Basic Language Features
Strings
Regular Expressions
Declarative Programming
Advanced Language Features
Numbers
8 kyu
101 Dalmatians - squash the bugs, not the dogs!
78
78
20
78%
of
1,112
7,534
A.Partridge
1 Issue Reported
Bugs
5 kyu
Church Booleans
6
6
6
90%
of
35
93
PaulBlanche
Fundamentals
Lambdas
Functional Programming
Functions
Declarative Programming
Control Flow
Basic Language Features
7 kyu
Looking for a benefactor
76
76
19
78%
of
639
3,920
g964
Fundamentals
Arithmetic
Mathematics
Algorithms
Numbers
8 kyu
Grasshopper - Personalized Message
65
65
29
84%
of
1,579
11,375
danleavitt0
1 Issue Reported
Fundamentals
Conditional Statements
Control Flow
Basic Language Features
Loading...
Confirm