2,746
students have developed their Nim skills on Exercism.

Students
2,746
Submissions
38,147
Mentoring Discussions
703

The Nim track needs attention ⚠️

Building

Build

Use your knowledge to build the Nim 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
34,019
Test Run Pass Rate
34.7% (11818)
Test Run Fail Rate
21.1% (7180)
Test Run Error Rate
44.2% (15021)

Build Analyzers

Learn More

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

Next goal: Build an Analyzer. Find out more.

Build Representers

Learn More

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 129 practice exercises. Find out more.

Usage statistics

70 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
1,897
2,611 (avg. 1.4)
1,640 (86.5%)
0 (0.0%)
Two Fer Two Fer
1,364
5,345 (avg. 3.9)
974 (71.4%)
213 (15.6%)
Leap Leap
957
2,622 (avg. 2.7)
806 (84.2%)
125 (13.1%)
Bob Bob
620
4,624 (avg. 7.5)
415 (66.9%)
88 (14.2%)
Allergies Allergies
377
2,022 (avg. 5.4)
260 (69.0%)
55 (14.6%)
Sum of Multiples Sum of Multiples
320
1,755 (avg. 5.5)
249 (77.8%)
38 (11.9%)
Grade School Grade School
217
1,106 (avg. 5.1)
167 (77.0%)
28 (12.9%)
Hamming Hamming
413
1,011 (avg. 2.4)
356 (86.2%)
15 (3.6%)
Pangram Pangram
462
1,044 (avg. 2.3)
378 (81.8%)
14 (3.0%)
Acronym Acronym
236
881 (avg. 3.7)
198 (83.9%)
10 (4.2%)
Isogram Isogram
394
835 (avg. 2.1)
327 (83.0%)
13 (3.3%)
Difference of Squares Difference of Squares
232
566 (avg. 2.4)
191 (82.3%)
7 (3.0%)
Triangle Triangle
198
740 (avg. 3.7)
152 (76.8%)
10 (5.1%)
Anagram Anagram
182
524 (avg. 2.9)
152 (83.5%)
4 (2.2%)
Matching Brackets Matching Brackets
161
669 (avg. 4.2)
121 (75.2%)
5 (3.1%)
Word Count Word Count
236
770 (avg. 3.3)
172 (72.9%)
3 (1.3%)
Armstrong Numbers Armstrong Numbers
178
569 (avg. 3.2)
147 (82.6%)
8 (4.5%)
Collatz Conjecture Collatz Conjecture
155
436 (avg. 2.8)
123 (79.4%)
5 (3.2%)
Scrabble Score Scrabble Score
119
234 (avg. 2.0)
91 (76.5%)
3 (2.5%)
Grains Grains
143
600 (avg. 4.2)
108 (75.5%)
5 (3.5%)
Atbash Cipher Atbash Cipher
125
403 (avg. 3.2)
89 (71.2%)
2 (1.6%)
All Your Base All Your Base
96
342 (avg. 3.6)
67 (69.8%)
4 (4.2%)
Binary Search Binary Search
44
174 (avg. 4.0)
32 (72.7%)
3 (6.8%)
Clock Clock
94
235 (avg. 2.5)
62 (66.0%)
0 (0.0%)
Crypto Square Crypto Square
82
267 (avg. 3.3)
46 (56.1%)
0 (0.0%)
Darts Darts
96
183 (avg. 1.9)
68 (70.8%)
4 (4.2%)
Diamond Diamond
71
102 (avg. 1.4)
43 (60.6%)
1 (1.4%)
Diffie-Hellman Diffie-Hellman
86
92 (avg. 1.1)
52 (60.5%)
2 (2.3%)
D&D Character D&D Character
31
69 (avg. 2.2)
22 (71.0%)
1 (3.2%)
ETL ETL
80
101 (avg. 1.3)
56 (70.0%)
0 (0.0%)
Gigasecond Gigasecond
186
215 (avg. 1.2)
145 (78.0%)
2 (1.1%)
High Scores High Scores
78
128 (avg. 1.6)
54 (69.2%)
2 (2.6%)
ISBN Verifier ISBN Verifier
76
189 (avg. 2.5)
50 (65.8%)
2 (2.6%)
Kindergarten Garden Kindergarten Garden
68
124 (avg. 1.8)
44 (64.7%)
0 (0.0%)
Largest Series Product Largest Series Product
69
164 (avg. 2.4)
44 (63.8%)
1 (1.4%)
Luhn Luhn
77
148 (avg. 1.9)
50 (64.9%)
1 (1.3%)
Matrix Matrix
64
127 (avg. 2.0)
42 (65.6%)
0 (0.0%)
Meetup Meetup
54
91 (avg. 1.7)
32 (59.3%)
2 (3.7%)
Nth Prime Nth Prime
101
189 (avg. 1.9)
68 (67.3%)
2 (2.0%)
Nucleotide Count Nucleotide Count
100
131 (avg. 1.3)
72 (72.0%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
60
95 (avg. 1.6)
41 (68.3%)
0 (0.0%)
Perfect Numbers Perfect Numbers
62
147 (avg. 2.4)
38 (61.3%)
1 (1.6%)
Phone Number Phone Number
59
71 (avg. 1.2)
34 (57.6%)
0 (0.0%)
Prime Factors Prime Factors
61
151 (avg. 2.5)
40 (65.6%)
1 (1.6%)
Protein Translation Protein Translation
56
92 (avg. 1.6)
37 (66.1%)
1 (1.8%)
Proverb Proverb
54
93 (avg. 1.7)
36 (66.7%)
0 (0.0%)
Queen Attack Queen Attack
93
208 (avg. 2.2)
67 (72.0%)
3 (3.2%)
Raindrops Raindrops
97
105 (avg. 1.1)
69 (71.1%)
1 (1.0%)
Resistor Color Resistor Color
65
118 (avg. 1.8)
42 (64.6%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
63
77 (avg. 1.2)
40 (63.5%)
0 (0.0%)
Resistor Color Trio Resistor Color Trio
53
100 (avg. 1.9)
35 (66.0%)
0 (0.0%)
Reverse String Reverse String
364
621 (avg. 1.7)
294 (80.8%)
7 (1.9%)
RNA Transcription RNA Transcription
247
348 (avg. 1.4)
207 (83.8%)
1 (0.4%)
Robot Name Robot Name
59
86 (avg. 1.5)
31 (52.5%)
0 (0.0%)
Roman Numerals Roman Numerals
99
166 (avg. 1.7)
73 (73.7%)
0 (0.0%)
Rotational Cipher Rotational Cipher
53
72 (avg. 1.4)
33 (62.3%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
143
196 (avg. 1.4)
100 (69.9%)
4 (2.8%)
Saddle Points Saddle Points
53
90 (avg. 1.7)
31 (58.5%)
1 (1.9%)
Say Say
51
73 (avg. 1.4)
30 (58.8%)
0 (0.0%)
Scale Generator Scale Generator
48
60 (avg. 1.3)
25 (52.1%)
0 (0.0%)
Secret Handshake Secret Handshake
71
180 (avg. 2.5)
50 (70.4%)
1 (1.4%)
Series Series
55
102 (avg. 1.9)
31 (56.4%)
0 (0.0%)
Sieve Sieve
77
281 (avg. 3.6)
48 (62.3%)
1 (1.3%)
Space Age Space Age
101
163 (avg. 1.6)
75 (74.3%)
1 (1.0%)
Spiral Matrix Spiral Matrix
52
64 (avg. 1.2)
25 (48.1%)
1 (1.9%)
Sublist Sublist
63
190 (avg. 3.0)
36 (57.1%)
0 (0.0%)
Twelve Days Twelve Days
54
216 (avg. 4.0)
29 (53.7%)
0 (0.0%)
Yacht Yacht
62
419 (avg. 6.8)
37 (59.7%)
2 (3.2%)
Linked List Linked List
49
776 (avg. 15.8)
27 (55.1%)
4 (8.2%)
React React
139
323 (avg. 2.3)
37 (26.6%)
3 (2.2%)
1 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Binary Binary
18
25 (avg. 1.4)
16 (88.9%)
0 (0.0%)
59 unimplemented practice exercises
Affine Cipher Affine Cipher
Alphametics Alphametics
Bank Account Bank Account
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Change Change
Circular Buffer Circular Buffer
Complex Numbers Complex Numbers
Connect Connect
Custom Set Custom Set
DOT DSL DOT DSL
Dominoes Dominoes
Error Handling Error Handling
Flatten Array Flatten Array
Food Chain Food Chain
Forth Forth
Go Counting Go Counting
Grep Grep
Hangman Hangman
House House
Killer Sudoku Helper Killer Sudoku Helper
Knapsack Knapsack
Ledger Ledger
Lens Person Lens Person
List Ops List Ops
Markdown Markdown
Micro Blog Micro Blog
Minesweeper Minesweeper
OCR Numbers OCR Numbers
POV POV
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Pig Latin Pig Latin
Poker Poker
Pythagorean Triplet Pythagorean Triplet
REST API REST API
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
Rectangles Rectangles
Robot Simulator Robot Simulator
SGF Parsing SGF Parsing
Satellite Satellite
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Square Root Square Root
State of Tic-Tac-Toe State of Tic-Tac-Toe
Strain Strain
Tournament Tournament
Transpose Transpose
Tree Building Tree Building
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Wordy Wordy
Zebra Puzzle Zebra Puzzle
Zipper Zipper