2,419
students have developed their Nim skills on Exercism.

Students
2,419
Submissions
29,642
Mentoring Discussions
663

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
25,506
Test Run Pass Rate
36.2% (9238)
Test Run Fail Rate
19.5% (4980)
Test Run Error Rate
44.3% (11288)

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
1,587
2,081 (avg. 1.3)
1,368 (86.2%)
0 (0.0%)
Two Fer Two Fer
1,150
4,261 (avg. 3.7)
819 (71.2%)
209 (18.2%)
Leap Leap
804
2,101 (avg. 2.6)
681 (84.7%)
123 (15.3%)
Bob Bob
506
3,499 (avg. 6.9)
351 (69.4%)
81 (16.0%)
Allergies Allergies
305
1,788 (avg. 5.9)
211 (69.2%)
51 (16.7%)
Sum of Multiples Sum of Multiples
256
1,278 (avg. 5.0)
203 (79.3%)
33 (12.9%)
Grade School Grade School
176
884 (avg. 5.0)
138 (78.4%)
24 (13.6%)
Hamming Hamming
371
867 (avg. 2.3)
320 (86.3%)
15 (4.0%)
Pangram Pangram
419
865 (avg. 2.1)
343 (81.9%)
14 (3.3%)
Acronym Acronym
198
689 (avg. 3.5)
167 (84.3%)
9 (4.5%)
Isogram Isogram
361
704 (avg. 2.0)
300 (83.1%)
13 (3.6%)
Difference of Squares Difference of Squares
199
454 (avg. 2.3)
165 (82.9%)
7 (3.5%)
Triangle Triangle
165
544 (avg. 3.3)
129 (78.2%)
9 (5.5%)
Anagram Anagram
154
406 (avg. 2.6)
128 (83.1%)
3 (1.9%)
Matching Brackets Matching Brackets
128
475 (avg. 3.7)
97 (75.8%)
5 (3.9%)
Word Count Word Count
212
605 (avg. 2.9)
154 (72.6%)
3 (1.4%)
Armstrong Numbers Armstrong Numbers
151
422 (avg. 2.8)
125 (82.8%)
8 (5.3%)
Collatz Conjecture Collatz Conjecture
129
304 (avg. 2.4)
105 (81.4%)
4 (3.1%)
Scrabble Score Scrabble Score
97
171 (avg. 1.8)
74 (76.3%)
3 (3.1%)
Grains Grains
118
458 (avg. 3.9)
95 (80.5%)
4 (3.4%)
Atbash Cipher Atbash Cipher
105
269 (avg. 2.6)
77 (73.3%)
2 (1.9%)
All Your Base All Your Base
73
148 (avg. 2.0)
51 (69.9%)
1 (1.4%)
Binary Search Binary Search
16
83 (avg. 5.2)
12 (75.0%)
2 (12.5%)
Clock Clock
77
160 (avg. 2.1)
52 (67.5%)
0 (0.0%)
Crypto Square Crypto Square
65
198 (avg. 3.0)
36 (55.4%)
0 (0.0%)
Darts Darts
79
141 (avg. 1.8)
57 (72.2%)
4 (5.1%)
Diamond Diamond
54
59 (avg. 1.1)
32 (59.3%)
1 (1.9%)
Diffie-Hellman Diffie-Hellman
65
55 (avg. 0.8)
40 (61.5%)
2 (3.1%)
D&D Character D&D Character
9
10 (avg. 1.1)
7 (77.8%)
1 (11.1%)
ETL ETL
63
85 (avg. 1.3)
45 (71.4%)
0 (0.0%)
Gigasecond Gigasecond
168
188 (avg. 1.1)
133 (79.2%)
2 (1.2%)
High Scores High Scores
63
110 (avg. 1.7)
43 (68.3%)
2 (3.2%)
ISBN Verifier ISBN Verifier
60
103 (avg. 1.7)
38 (63.3%)
1 (1.7%)
Kindergarten Garden Kindergarten Garden
51
78 (avg. 1.5)
32 (62.7%)
0 (0.0%)
Largest Series Product Largest Series Product
54
113 (avg. 2.1)
34 (63.0%)
1 (1.9%)
Luhn Luhn
62
104 (avg. 1.7)
39 (62.9%)
1 (1.6%)
Matrix Matrix
50
104 (avg. 2.1)
32 (64.0%)
0 (0.0%)
Meetup Meetup
41
44 (avg. 1.1)
23 (56.1%)
1 (2.4%)
Nth Prime Nth Prime
86
150 (avg. 1.7)
56 (65.1%)
1 (1.2%)
Nucleotide Count Nucleotide Count
87
112 (avg. 1.3)
63 (72.4%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
44
50 (avg. 1.1)
30 (68.2%)
0 (0.0%)
Perfect Numbers Perfect Numbers
46
54 (avg. 1.2)
27 (58.7%)
1 (2.2%)
Phone Number Phone Number
46
55 (avg. 1.2)
25 (54.3%)
0 (0.0%)
Prime Factors Prime Factors
49
132 (avg. 2.7)
31 (63.3%)
1 (2.0%)
Protein Translation Protein Translation
46
81 (avg. 1.8)
30 (65.2%)
1 (2.2%)
Proverb Proverb
42
57 (avg. 1.4)
27 (64.3%)
0 (0.0%)
Queen Attack Queen Attack
80
195 (avg. 2.4)
59 (73.8%)
3 (3.8%)
Raindrops Raindrops
83
88 (avg. 1.1)
59 (71.1%)
1 (1.2%)
Resistor Color Resistor Color
53
80 (avg. 1.5)
33 (62.3%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
49
59 (avg. 1.2)
29 (59.2%)
0 (0.0%)
Resistor Color Trio Resistor Color Trio
41
75 (avg. 1.8)
27 (65.9%)
0 (0.0%)
Reverse String Reverse String
345
533 (avg. 1.5)
280 (81.2%)
7 (2.0%)
RNA Transcription RNA Transcription
237
342 (avg. 1.4)
201 (84.8%)
1 (0.4%)
Robot Name Robot Name
48
56 (avg. 1.2)
24 (50.0%)
0 (0.0%)
Roman Numerals Roman Numerals
87
154 (avg. 1.8)
64 (73.6%)
0 (0.0%)
Rotational Cipher Rotational Cipher
43
58 (avg. 1.3)
26 (60.5%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
132
172 (avg. 1.3)
91 (68.9%)
4 (3.0%)
Saddle Points Saddle Points
39
42 (avg. 1.1)
23 (59.0%)
0 (0.0%)
Say Say
41
47 (avg. 1.1)
24 (58.5%)
0 (0.0%)
Scale Generator Scale Generator
37
50 (avg. 1.4)
20 (54.1%)
0 (0.0%)
Secret Handshake Secret Handshake
56
121 (avg. 2.2)
39 (69.6%)
1 (1.8%)
Series Series
44
59 (avg. 1.3)
25 (56.8%)
0 (0.0%)
Sieve Sieve
60
218 (avg. 3.6)
36 (60.0%)
1 (1.7%)
Space Age Space Age
90
148 (avg. 1.6)
67 (74.4%)
1 (1.1%)
Spiral Matrix Spiral Matrix
43
55 (avg. 1.3)
20 (46.5%)
1 (2.3%)
Sublist Sublist
49
170 (avg. 3.5)
27 (55.1%)
0 (0.0%)
Twelve Days Twelve Days
40
190 (avg. 4.8)
21 (52.5%)
0 (0.0%)
Yacht Yacht
50
398 (avg. 8.0)
30 (60.0%)
2 (4.0%)
Linked List Linked List
21
410 (avg. 19.5)
14 (66.7%)
2 (9.5%)
React React
121
297 (avg. 2.5)
34 (28.1%)
2 (1.7%)
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