79,507
students have developed their Rust skills on Exercism.

Students
79,507
Submissions
1,787,974
Mentoring Discussions
24,664

The Rust track needs attention ⚠️

Building

Build

Use your knowledge to build the Rust 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
1,614,028
Test Run Pass Rate
25.1% (405300)
Test Run Fail Rate
22.3% (360673)
Test Run Error Rate
52.5% (848055)

Build Analyzers

Learn More

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

Usage statistics

Total Analyzer Runs
294,478
Total Analysis Comments Made
41,584
Feedback Given Frequency
1.1%

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.

Usage statistics

Total Representer Runs
294,487
Total Representation Comments Made
0
Feedback Given Frequency
0.0%

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 137 practice exercises. Find out more.

Usage statistics

97 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
62,312
103,691 (avg. 1.7)
55,661 (89.3%)
28 (0.0%)
Reverse String Reverse String
21,935
58,931 (avg. 2.7)
16,265 (74.2%)
3,981 (18.1%)
Gigasecond Gigasecond
17,652
40,780 (avg. 2.3)
14,696 (83.3%)
3,842 (21.8%)
Clock Clock
11,498
78,041 (avg. 6.8)
8,305 (72.2%)
2,732 (23.8%)
Anagram Anagram
6,556
37,746 (avg. 5.8)
4,975 (75.9%)
1,684 (25.7%)
Space Age Space Age
4,668
15,064 (avg. 3.2)
3,770 (80.8%)
1,085 (23.2%)
Sublist Sublist
11,356
65,244 (avg. 5.7)
6,684 (58.9%)
1,159 (10.2%)
Minesweeper Minesweeper
3,889
22,285 (avg. 5.7)
2,528 (65.0%)
626 (16.1%)
Luhn Luhn
3,798
19,975 (avg. 5.3)
3,153 (83.0%)
553 (14.6%)
Parallel Letter Frequency Parallel Letter Frequency
2,706
12,715 (avg. 4.7)
1,600 (59.1%)
424 (15.7%)
Macros Macros
2,065
8,930 (avg. 4.3)
1,524 (73.8%)
299 (14.5%)
Poker Poker
3,408
19,061 (avg. 5.6)
986 (28.9%)
241 (7.1%)
Forth Forth
1,362
8,723 (avg. 6.4)
648 (47.6%)
140 (10.3%)
Armstrong Numbers Armstrong Numbers
7,437
25,121 (avg. 3.4)
6,198 (83.3%)
153 (2.1%)
Beer Song Beer Song
10,305
38,673 (avg. 3.8)
8,161 (79.2%)
172 (1.7%)
Difference of Squares Difference of Squares
8,872
15,880 (avg. 1.8)
8,032 (90.5%)
199 (2.2%)
Grains Grains
7,593
19,209 (avg. 2.5)
6,726 (88.6%)
111 (1.5%)
Leap Leap
17,441
22,680 (avg. 1.3)
14,999 (86.0%)
453 (2.6%)
Nth Prime Nth Prime
11,366
23,698 (avg. 2.1)
8,156 (71.8%)
326 (2.9%)
Prime Factors Prime Factors
5,887
12,536 (avg. 2.1)
4,829 (82.0%)
64 (1.1%)
Proverb Proverb
7,355
14,998 (avg. 2.0)
6,186 (84.1%)
110 (1.5%)
Raindrops Raindrops
14,279
21,641 (avg. 1.5)
12,267 (85.9%)
384 (2.7%)
Sum of Multiples Sum of Multiples
7,392
16,715 (avg. 2.3)
6,197 (83.8%)
124 (1.7%)
Bob Bob
7,772
22,797 (avg. 2.9)
6,314 (81.2%)
826 (10.6%)
High Scores High Scores
4,592
20,521 (avg. 4.5)
3,581 (78.0%)
89 (1.9%)
Matching Brackets Matching Brackets
5,317
15,351 (avg. 2.9)
4,287 (80.6%)
240 (4.5%)
Acronym Acronym
3,099
11,943 (avg. 3.9)
2,316 (74.7%)
31 (1.0%)
All Your Base All Your Base
1,936
6,694 (avg. 3.5)
1,463 (75.6%)
25 (1.3%)
Allergies Allergies
3,768
21,040 (avg. 5.6)
2,822 (74.9%)
107 (2.8%)
Alphametics Alphametics
1,725
5,960 (avg. 3.5)
694 (40.2%)
40 (2.3%)
Binary Search Binary Search
2,556
8,107 (avg. 3.2)
1,947 (76.2%)
32 (1.3%)
Bowling Bowling
2,174
10,828 (avg. 5.0)
1,210 (55.7%)
27 (1.2%)
DOT DSL DOT DSL
3,126
9,127 (avg. 2.9)
1,827 (58.4%)
47 (1.5%)
ETL ETL
2,659
4,581 (avg. 1.7)
2,208 (83.0%)
27 (1.0%)
Grade School Grade School
2,373
7,404 (avg. 3.1)
1,976 (83.3%)
30 (1.3%)
Hamming Hamming
2,708
4,395 (avg. 1.6)
2,389 (88.2%)
51 (1.9%)
ISBN Verifier ISBN Verifier
1,947
6,052 (avg. 3.1)
1,533 (78.7%)
16 (0.8%)
Isogram Isogram
2,362
4,704 (avg. 2.0)
1,962 (83.1%)
17 (0.7%)
Nucleotide Count Nucleotide Count
3,092
7,496 (avg. 2.4)
2,641 (85.4%)
39 (1.3%)
PaaS I/O PaaS I/O
2,336
2,856 (avg. 1.2)
1,407 (60.2%)
12 (0.5%)
Palindrome Products Palindrome Products
1,236
5,150 (avg. 4.2)
796 (64.4%)
16 (1.3%)
Pangram Pangram
2,178
4,479 (avg. 2.1)
1,903 (87.4%)
39 (1.8%)
Pascal's Triangle Pascal's Triangle
2,831
5,293 (avg. 1.9)
2,337 (82.6%)
28 (1.0%)
Perfect Numbers Perfect Numbers
1,558
3,140 (avg. 2.0)
1,287 (82.6%)
35 (2.2%)
Pig Latin Pig Latin
892
2,070 (avg. 2.3)
545 (61.1%)
6 (0.7%)
Queen Attack Queen Attack
2,075
4,296 (avg. 2.1)
1,744 (84.0%)
13 (0.6%)
RNA Transcription RNA Transcription
2,644
6,305 (avg. 2.4)
2,195 (83.0%)
32 (1.2%)
Run-Length Encoding Run-Length Encoding
2,009
4,743 (avg. 2.4)
1,551 (77.2%)
28 (1.4%)
Saddle Points Saddle Points
2,713
4,254 (avg. 1.6)
1,827 (67.3%)
309 (11.4%)
Say Say
1,625
3,452 (avg. 2.1)
1,063 (65.4%)
12 (0.7%)
Scrabble Score Scrabble Score
1,997
3,407 (avg. 1.7)
1,707 (85.5%)
22 (1.1%)
Sieve Sieve
2,184
4,520 (avg. 2.1)
1,815 (83.1%)
28 (1.3%)
Simple Linked List Simple Linked List
3,471
16,241 (avg. 4.7)
2,256 (65.0%)
109 (3.1%)
Spiral Matrix Spiral Matrix
1,025
2,197 (avg. 2.1)
676 (66.0%)
8 (0.8%)
Tournament Tournament
2,367
15,175 (avg. 6.4)
1,713 (72.4%)
62 (2.6%)
Triangle Triangle
2,000
4,271 (avg. 2.1)
1,656 (82.8%)
23 (1.2%)
Two Bucket Two Bucket
985
1,474 (avg. 1.5)
511 (51.9%)
11 (1.1%)
Variable Length Quantity Variable Length Quantity
991
2,067 (avg. 2.1)
640 (64.6%)
6 (0.6%)
Robot Simulator Robot Simulator
2,727
10,287 (avg. 3.8)
2,257 (82.8%)
40 (1.5%)
Robot Name Robot Name
1,174
4,046 (avg. 3.4)
812 (69.2%)
29 (2.5%)
Protein Translation Protein Translation
1,107
3,157 (avg. 2.9)
768 (69.4%)
8 (0.7%)
OCR Numbers OCR Numbers
862
2,410 (avg. 2.8)
490 (56.8%)
9 (1.0%)
React React
1,285
3,287 (avg. 2.6)
425 (33.1%)
17 (1.3%)
Wordy Wordy
835
2,240 (avg. 2.7)
560 (67.1%)
7 (0.8%)
Custom Set Custom Set
1,062
3,158 (avg. 3.0)
705 (66.4%)
11 (1.0%)
Circular Buffer Circular Buffer
1,247
3,748 (avg. 3.0)
763 (61.2%)
24 (1.9%)
Rectangles Rectangles
966
3,704 (avg. 3.8)
489 (50.6%)
11 (1.1%)
Collatz Conjecture Collatz Conjecture
2,620
8,367 (avg. 3.2)
2,142 (81.8%)
46 (1.8%)
Diffie-Hellman Diffie-Hellman
2,334
7,486 (avg. 3.2)
1,598 (68.5%)
40 (1.7%)
Series Series
2,494
7,269 (avg. 2.9)
2,018 (80.9%)
36 (1.4%)
Accumulate Accumulate
1,014
3,036 (avg. 3.0)
743 (73.3%)
26 (2.6%)
Affine Cipher Affine Cipher
595
2,291 (avg. 3.9)
381 (64.0%)
5 (0.8%)
Atbash Cipher Atbash Cipher
1,984
5,188 (avg. 2.6)
1,509 (76.1%)
796 (40.1%)
Crypto Square Crypto Square
847
1,551 (avg. 1.8)
552 (65.2%)
5 (0.6%)
Diamond Diamond
658
1,762 (avg. 2.7)
435 (66.1%)
0 (0.0%)
Largest Series Product Largest Series Product
1,078
2,640 (avg. 2.4)
844 (78.3%)
16 (1.5%)
Luhn From Luhn From
972
1,842 (avg. 1.9)
711 (73.1%)
8 (0.8%)
Luhn Trait Luhn Trait
837
1,044 (avg. 1.2)
616 (73.6%)
3 (0.4%)
Phone Number Phone Number
912
2,189 (avg. 2.4)
687 (75.3%)
18 (2.0%)
Rail Fence Cipher Rail Fence Cipher
623
1,544 (avg. 2.5)
374 (60.0%)
4 (0.6%)
Roman Numerals Roman Numerals
1,052
2,122 (avg. 2.0)
791 (75.2%)
5 (0.5%)
Rotational Cipher Rotational Cipher
943
1,717 (avg. 1.8)
724 (76.8%)
12 (1.3%)
Simple Cipher Simple Cipher
746
2,207 (avg. 3.0)
463 (62.1%)
5 (0.7%)
Word Count Word Count
1,665
4,495 (avg. 2.7)
1,370 (82.3%)
40 (2.4%)
Fizzy Fizzy
789
3,189 (avg. 4.0)
399 (50.6%)
5 (0.6%)
Pythagorean Triplet Pythagorean Triplet
3,665
6,151 (avg. 1.7)
1,932 (52.7%)
1,314 (35.9%)
Xorcism Xorcism
667
2,606 (avg. 3.9)
222 (33.3%)
14 (2.1%)
Book Store Book Store
541
1,080 (avg. 2.0)
247 (45.7%)
6 (1.1%)
Decimal Decimal
669
2,019 (avg. 3.0)
283 (42.3%)
1 (0.1%)
Grep Grep
653
2,116 (avg. 3.2)
320 (49.0%)
7 (1.1%)
Scale Generator Scale Generator
1,061
4,125 (avg. 3.9)
454 (42.8%)
7 (0.7%)
Dominoes Dominoes
674
1,661 (avg. 2.5)
331 (49.1%)
14 (2.1%)
Doubly Linked List Doubly Linked List
665
1,617 (avg. 2.4)
175 (26.3%)
9 (1.4%)
Secret Handshake Secret Handshake
233
773 (avg. 3.3)
176 (75.5%)
9 (3.9%)
Knapsack Knapsack
77
297 (avg. 3.9)
42 (54.5%)
1 (1.3%)
Kindergarten Garden Kindergarten Garden
206
1,185 (avg. 5.8)
140 (68.0%)
3 (1.5%)
Yacht Yacht
86
467 (avg. 5.4)
57 (66.3%)
3 (3.5%)
3 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Hexadecimal Hexadecimal
120
184 (avg. 1.5)
114 (95.0%)
10 (8.3%)
Nucleotide Codons Nucleotide Codons
133
157 (avg. 1.2)
129 (97.0%)
1 (0.8%)
Two Fer Two Fer
23
28 (avg. 1.2)
4 (17.4%)
1 (4.3%)
40 unimplemented practice exercises
Bank Account Bank Account
Binary Search Tree Binary Search Tree
Bottle Song Bottle Song
Change Change
Complex Numbers Complex Numbers
Connect Connect
D&D Character D&D Character
Darts Darts
Error Handling Error Handling
Flatten Array Flatten Array
Food Chain Food Chain
Go Counting Go Counting
Hangman Hangman
House House
Killer Sudoku Helper Killer Sudoku Helper
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
List Ops List Ops
Markdown Markdown
Matrix Matrix
Meetup Meetup
Micro Blog Micro Blog
POV POV
REST API REST API
Rational Numbers Rational Numbers
Resistor Color Resistor Color
Resistor Color Duo Resistor Color Duo
Resistor Color Trio Resistor Color Trio
SGF Parsing SGF Parsing
Satellite Satellite
Square Root Square Root
State of Tic-Tac-Toe State of Tic-Tac-Toe
Strain Strain
Transpose Transpose
Tree Building Tree Building
Twelve Days Twelve Days
Word Search Word Search
Zebra Puzzle Zebra Puzzle
Zipper Zipper
3 foregone practice exercises
Binary Binary
Octal Octal
Trinary Trinary