693
students have developed their Raku skills on Exercism.

Students
693
Submissions
16,192
Mentoring Discussions
276

The Raku track needs attention ⚠️

Building

Build

Use your knowledge to build the Raku track itself

Build Test Runners

Learn More

Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Usage statistics

Total Test Runner Runs
14,420
Test Run Pass Rate
25.3% (3654)
Test Run Fail Rate
70.9% (10221)
Test Run Error Rate
3.8% (545)

Build Analyzers

Learn More

Build an Analyzer for Raku: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.

Build Representers

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Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Create Practice Exercises

Learn More

Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Next goal: Implement at least 50 practice exercises. Find out more.

Usage statistics

40 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
330
627 (avg. 1.9)
253 (76.7%)
0 (0.0%)
Leap Leap
209
703 (avg. 3.4)
171 (81.8%)
71 (34.0%)
Bob Bob
155
967 (avg. 6.2)
106 (68.4%)
38 (24.5%)
Nucleotide Count Nucleotide Count
78
645 (avg. 8.3)
53 (67.9%)
22 (28.2%)
Pangram Pangram
62
417 (avg. 6.7)
53 (85.5%)
18 (29.0%)
Clock Clock
51
432 (avg. 8.5)
39 (76.5%)
13 (25.5%)
Raindrops Raindrops
58
345 (avg. 5.9)
53 (91.4%)
12 (20.7%)
Phone Number Phone Number
46
613 (avg. 13.3)
37 (80.4%)
11 (23.9%)
Allergies Allergies
38
241 (avg. 6.3)
29 (76.3%)
6 (15.8%)
All Your Base All Your Base
25
902 (avg. 36.1)
19 (76.0%)
7 (28.0%)
Robot Name Robot Name
31
321 (avg. 10.4)
27 (87.1%)
5 (16.1%)
Two Fer Two Fer
124
209 (avg. 1.7)
106 (85.5%)
9 (7.3%)
Luhn Luhn
43
716 (avg. 16.7)
33 (76.7%)
9 (20.9%)
RNA Transcription RNA Transcription
43
194 (avg. 4.5)
41 (95.3%)
3 (7.0%)
Hamming Hamming
39
166 (avg. 4.3)
36 (92.3%)
3 (7.7%)
Anagram Anagram
39
384 (avg. 9.8)
35 (89.7%)
5 (12.8%)
Word Count Word Count
41
455 (avg. 11.1)
38 (92.7%)
4 (9.8%)
ETL ETL
31
820 (avg. 26.5)
27 (87.1%)
4 (12.9%)
Meetup Meetup
20
725 (avg. 36.3)
15 (75.0%)
1 (5.0%)
Accumulate Accumulate
47
248 (avg. 5.3)
43 (91.5%)
5 (10.6%)
Acronym Acronym
39
652 (avg. 16.7)
32 (82.1%)
5 (12.8%)
Grains Grains
55
242 (avg. 4.4)
51 (92.7%)
4 (7.3%)
Flatten Array Flatten Array
34
699 (avg. 20.6)
29 (85.3%)
6 (17.6%)
Grade School Grade School
29
657 (avg. 22.7)
23 (79.3%)
3 (10.3%)
Space Age Space Age
32
159 (avg. 5.0)
22 (68.8%)
1 (3.1%)
Atbash Cipher Atbash Cipher
37
287 (avg. 7.8)
28 (75.7%)
5 (13.5%)
Roman Numerals Roman Numerals
25
324 (avg. 13.0)
21 (84.0%)
2 (8.0%)
Scrabble Score Scrabble Score
51
243 (avg. 4.8)
45 (88.2%)
4 (7.8%)
Linked List Linked List
27
65 (avg. 2.4)
17 (63.0%)
2 (7.4%)
Wordy Wordy
47
253 (avg. 5.4)
33 (70.2%)
5 (10.6%)
Binary Search Tree Binary Search Tree
4
25 (avg. 6.3)
1 (25.0%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
6
298 (avg. 49.7)
5 (83.3%)
0 (0.0%)
Crypto Square Crypto Square
4
305 (avg. 76.3)
2 (50.0%)
1 (25.0%)
Armstrong Numbers Armstrong Numbers
5
78 (avg. 15.6)
4 (80.0%)
0 (0.0%)
Difference of Squares Difference of Squares
5
100 (avg. 20.0)
5 (100.0%)
0 (0.0%)
Affine Cipher Affine Cipher
4
445 (avg. 111.3)
2 (50.0%)
0 (0.0%)
Bottle Song Bottle Song
3
123 (avg. 41.0)
1 (33.3%)
0 (0.0%)
Binary Search Binary Search
3
153 (avg. 51.0)
2 (66.7%)
0 (0.0%)
Isogram Isogram
5
121 (avg. 24.2)
4 (80.0%)
1 (20.0%)
ISBN Verifier ISBN Verifier
2
614 (avg. 307.0)
1 (50.0%)
2 (100.0%)
3 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Beer Song Beer Song
8
210 (avg. 26.3)
7 (87.5%)
0 (0.0%)
Binary Binary
8
7 (avg. 0.9)
7 (87.5%)
0 (0.0%)
Trinary Trinary
3
2 (avg. 0.7)
2 (66.7%)
0 (0.0%)
89 unimplemented practice exercises
Alphametics Alphametics
Bank Account Bank Account
Book Store Book Store
Bowling Bowling
Change Change
Circular Buffer Circular Buffer
Complex Numbers Complex Numbers
Connect Connect
Custom Set Custom Set
D&D Character D&D Character
DOT DSL DOT DSL
Darts Darts
Diamond Diamond
Dominoes Dominoes
Error Handling Error Handling
Food Chain Food Chain
Forth Forth
Gigasecond Gigasecond
Go Counting Go Counting
Grep Grep
Hangman Hangman
High Scores High Scores
House House
Killer Sudoku Helper Killer Sudoku Helper
Kindergarten Garden Kindergarten Garden
Knapsack Knapsack
Largest Series Product Largest Series Product
Ledger Ledger
Lens Person Lens Person
List Ops List Ops
Markdown Markdown
Matching Brackets Matching Brackets
Matrix Matrix
Micro Blog Micro Blog
Minesweeper Minesweeper
Nth Prime Nth Prime
OCR Numbers OCR Numbers
POV POV
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Pascal's Triangle Pascal's Triangle
Perfect Numbers Perfect Numbers
Pig Latin Pig Latin
Poker Poker
Prime Factors Prime Factors
Protein Translation Protein Translation
Proverb Proverb
Pythagorean Triplet Pythagorean Triplet
Queen Attack Queen Attack
REST API REST API
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
Resistor Color Resistor Color
Resistor Color Duo Resistor Color Duo
Resistor Color Trio Resistor Color Trio
Reverse String Reverse String
Robot Simulator Robot Simulator
Rotational Cipher Rotational Cipher
Run-Length Encoding Run-Length Encoding
SGF Parsing SGF Parsing
Saddle Points Saddle Points
Satellite Satellite
Say Say
Scale Generator Scale Generator
Secret Handshake Secret Handshake
Series Series
Sieve Sieve
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Spiral Matrix Spiral Matrix
Square Root Square Root
State of Tic-Tac-Toe State of Tic-Tac-Toe
Strain Strain
Sublist Sublist
Sum of Multiples Sum of Multiples
Tournament Tournament
Transpose Transpose
Tree Building Tree Building
Triangle Triangle
Twelve Days Twelve Days
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Yacht Yacht
Zebra Puzzle Zebra Puzzle
Zipper Zipper