Elm
Elm
About ElmLearnPractice

Elm Track Management

This page provides the Exercism community with the information and tools needed to manage the Elm track.

Students
6,598
Submissions
193,511
Mentoring Discussions
2,267

The Elm track is healthy ✅

Building

Elm syllabus

Learn More

Help create the track syllabus: is a set of concepts and learning exercises put together to teach foundational elements of the programming language.

Next goal: Create a complete syllabus with at least 30 concepts. Find out more.
28 concepts being taught
Ba
Basics 1
1,752 learnt
Ba
Basics 2
1,438 learnt
Bo
Booleans
1,011 learnt
Li
Lists
1,037 learnt
Re
Records
779 learnt
Cu
Custom Types
866 learnt
Tu
Tuples
424 learnt
Ma
Maybe
613 learnt
Re
Result
310 learnt
Pa
Pattern Matching
265 learnt
Le
Let
765 learnt
Di
Dict
213 learnt
Pa
Parsing
101 learnt
We
Web Applications
37 learnt
Pa
Partial Application and Function Composition
328 learnt
Co
Comparison
174 learnt
Se
Set
118 learnt
Ge
Generics
119 learnt
Op
Opaque Types
109 learnt
Ph
Phantom Types
78 learnt
Ar
Arrays
178 learnt
Ra
Random
61 learnt
St
Strings
193 learnt
Bi
Bitwise Operations
63 learnt
JS
JSON
28 learnt
Ti
Time
25 learnt
Re
Recursion
32 learnt
Ta
Tail Call Recursion
20 learnt
28 active learning exercises
Started
Attempts
Completions
Mentoring requests
Lucian's Luscious Lasagna Lucian's Luscious Lasagna
1,987
6,737 (avg. 3.4)
1,752 (88.2%)
18 (0.9%)
Betty's Bike Shop Betty's Bike Shop
1,549
9,257 (avg. 6.0)
1,438 (92.8%)
10 (0.6%)
Annalyn's Infiltration Annalyn's Infiltration
1,101
8,125 (avg. 7.4)
1,011 (91.8%)
8 (0.7%)
Tracks on Tracks on Tracks Tracks on Tracks on Tracks
1,146
14,957 (avg. 13.1)
1,037 (90.5%)
22 (1.9%)
Bandwagoner Bandwagoner
854
6,203 (avg. 7.3)
779 (91.2%)
10 (1.2%)
Valentines Day Valentines Day
897
4,155 (avg. 4.6)
866 (96.5%)
3 (0.3%)
Tisbury Treasure Hunt Tisbury Treasure Hunt
486
5,834 (avg. 12.0)
424 (87.2%)
5 (1.0%)
Role Playing Game Role Playing Game
665
9,929 (avg. 14.9)
613 (92.2%)
9 (1.4%)
Go Go
379
2,960 (avg. 7.8)
310 (81.8%)
6 (1.6%)
Ticket, Please! Ticket, Please!
301
4,668 (avg. 15.5)
265 (88.0%)
3 (1.0%)
Mario's marvellous lasagna Mario's marvellous lasagna
811
2,493 (avg. 3.1)
765 (94.3%)
2 (0.2%)
Top Scorers Top Scorers
271
5,150 (avg. 19.0)
213 (78.6%)
2 (0.7%)
Paola's Prestigious Pizza Paola's Prestigious Pizza
140
3,457 (avg. 24.7)
101 (72.1%)
5 (3.6%)
Paula's Palindromes Paula's Palindromes
41
248 (avg. 6.0)
37 (90.2%)
0 (0.0%)
Monster Attack Monster Attack
363
3,601 (avg. 9.9)
328 (90.4%)
5 (1.4%)
Blorkemon Cards Blorkemon Cards
192
2,099 (avg. 10.9)
174 (90.6%)
1 (0.5%)
Gotta Snatch'Em All Gotta Snatch'Em All
126
1,945 (avg. 15.4)
118 (93.7%)
1 (0.8%)
Treasure Chest Treasure Chest
124
880 (avg. 7.1)
119 (96.0%)
1 (0.8%)
Secure Treasure Chest Secure Treasure Chest
114
621 (avg. 5.4)
109 (95.6%)
2 (1.8%)
Treasure Factory Treasure Factory
105
1,359 (avg. 12.9)
78 (74.3%)
7 (6.7%)
Magician in training Magician in training
197
1,709 (avg. 8.7)
178 (90.4%)
3 (1.5%)
Maze Maker Maze Maker
78
720 (avg. 9.2)
61 (78.2%)
2 (2.6%)
Squeaky Clean Squeaky Clean
221
4,435 (avg. 20.1)
193 (87.3%)
7 (3.2%)
Secrets Secrets
78
424 (avg. 5.4)
63 (80.8%)
0 (0.0%)
GitHup API GitHup API
33
472 (avg. 14.3)
28 (84.8%)
1 (3.0%)
Kuroko's Clock Kuroko's Clock
27
182 (avg. 6.7)
25 (92.6%)
0 (0.0%)
Bird Count Bird Count
35
147 (avg. 4.2)
32 (91.4%)
0 (0.0%)
Piper's Pie Piper's Pie
24
240 (avg. 10.0)
20 (83.3%)
0 (0.0%)

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.

Synced primary repo: a1c06dccc343080215b85ba59f20bf38aaf40529 (Updates should be instant)

Next goal: Implement 137 practice exercises. Find out more.
82 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
5,291
6,740 (avg. 1.3)
4,584 (86.6%)
5 (0.1%)
Two Fer Two Fer
1,323
2,667 (avg. 2.0)
1,035 (78.2%)
562 (42.5%)
Bob Bob
1,813
6,443 (avg. 3.6)
1,438 (79.3%)
359 (19.8%)
Darts Darts
27
47 (avg. 1.7)
23 (85.2%)
0 (0.0%)
Leap Leap
1,309
3,193 (avg. 2.4)
1,201 (91.7%)
178 (13.6%)
Resistor Color Resistor Color
37
65 (avg. 1.8)
34 (91.9%)
0 (0.0%)
Resistor Color Duo Resistor Color Duo
33
111 (avg. 3.4)
30 (90.9%)
0 (0.0%)
Resistor Color Trio Resistor Color Trio
30
143 (avg. 4.8)
26 (86.7%)
0 (0.0%)
Space Age Space Age
738
1,567 (avg. 2.1)
665 (90.1%)
132 (17.9%)
Sum of Multiples Sum of Multiples
669
3,208 (avg. 4.8)
552 (82.5%)
105 (15.7%)
Grade School Grade School
399
2,991 (avg. 7.5)
343 (86.0%)
77 (19.3%)
Eliud's Eggs Eliud's Eggs
316
2,291 (avg. 7.3)
218 (69.0%)
12 (3.8%)
Raindrops Raindrops
852
2,402 (avg. 2.8)
814 (95.5%)
82 (9.6%)
Reverse String Reverse String
82
167 (avg. 2.0)
74 (90.2%)
0 (0.0%)
Robot Simulator Robot Simulator
335
1,975 (avg. 5.9)
277 (82.7%)
39 (11.6%)
Allergies Allergies
446
2,643 (avg. 5.9)
370 (83.0%)
44 (9.9%)
Hamming Hamming
555
1,507 (avg. 2.7)
484 (87.2%)
22 (4.0%)
Pangram Pangram
822
2,198 (avg. 2.7)
755 (91.8%)
40 (4.9%)
Isogram Isogram
323
1,541 (avg. 4.8)
274 (84.8%)
14 (4.3%)
Phone Number Phone Number
399
2,156 (avg. 5.4)
298 (74.7%)
14 (3.5%)
Square Root Square Root
23
42 (avg. 1.8)
19 (82.6%)
0 (0.0%)
Twelve Days Twelve Days
517
1,498 (avg. 2.9)
336 (65.0%)
93 (18.0%)
Acronym Acronym
245
761 (avg. 3.1)
200 (81.6%)
5 (2.0%)
Anagram Anagram
563
1,780 (avg. 3.2)
504 (89.5%)
32 (5.7%)
Series Series
268
1,255 (avg. 4.7)
221 (82.5%)
5 (1.9%)
Atbash Cipher Atbash Cipher
223
1,178 (avg. 5.3)
190 (85.2%)
3 (1.3%)
Luhn Luhn
203
1,232 (avg. 6.1)
144 (70.9%)
3 (1.5%)
Grains Grains
296
779 (avg. 2.6)
251 (84.8%)
3 (1.0%)
All Your Base All Your Base
182
1,004 (avg. 5.5)
127 (69.8%)
6 (3.3%)
Largest Series Product Largest Series Product
226
1,677 (avg. 7.4)
179 (79.2%)
5 (2.2%)
Triangle Triangle
588
1,384 (avg. 2.4)
553 (94.0%)
44 (7.5%)
Pythagorean Triplet Pythagorean Triplet
109
787 (avg. 7.2)
71 (65.1%)
1 (0.9%)
Collatz Conjecture Collatz Conjecture
314
647 (avg. 2.1)
247 (78.7%)
3 (1.0%)
Binary Search Binary Search
241
1,732 (avg. 7.2)
175 (72.6%)
10 (4.1%)
List Ops List Ops
255
1,173 (avg. 4.6)
215 (84.3%)
8 (3.1%)
Pascal's Triangle Pascal's Triangle
172
434 (avg. 2.5)
122 (70.9%)
4 (2.3%)
Roman Numerals Roman Numerals
169
531 (avg. 3.1)
129 (76.3%)
3 (1.8%)
ETL ETL
291
464 (avg. 1.6)
215 (73.9%)
3 (1.0%)
Nucleotide Count Nucleotide Count
329
733 (avg. 2.2)
280 (85.1%)
6 (1.8%)
Word Count Word Count
403
1,215 (avg. 3.0)
349 (86.6%)
12 (3.0%)
Strain Strain
454
730 (avg. 1.6)
400 (88.1%)
13 (2.9%)
Say Say
166
1,600 (avg. 9.6)
117 (70.5%)
3 (1.8%)
Wordy Wordy
78
830 (avg. 10.6)
59 (75.6%)
6 (7.7%)
Difference of Squares Difference of Squares
791
1,228 (avg. 1.6)
654 (82.7%)
21 (2.7%)
Gigasecond Gigasecond
464
697 (avg. 1.5)
352 (75.9%)
10 (2.2%)
RNA Transcription RNA Transcription
648
1,843 (avg. 2.8)
537 (82.9%)
23 (3.5%)
Armstrong Numbers Armstrong Numbers
181
703 (avg. 3.9)
156 (86.2%)
3 (1.7%)
Scrabble Score Scrabble Score
478
975 (avg. 2.0)
420 (87.9%)
32 (6.7%)
Run-Length Encoding Run-Length Encoding
349
1,649 (avg. 4.7)
286 (81.9%)
13 (3.7%)
Transpose Transpose
145
855 (avg. 5.9)
92 (63.4%)
2 (1.4%)
Matching Brackets Matching Brackets
162
764 (avg. 4.7)
123 (75.9%)
7 (4.3%)
Sublist Sublist
266
962 (avg. 3.6)
219 (82.3%)
7 (2.6%)
Bowling Bowling
58
793 (avg. 13.7)
28 (48.3%)
0 (0.0%)
Complex Numbers Complex Numbers
378
3,961 (avg. 10.5)
253 (66.9%)
4 (1.1%)
SGF Parsing SGF Parsing
31
849 (avg. 27.4)
23 (74.2%)
1 (3.2%)
Circular Buffer Circular Buffer
63
836 (avg. 13.3)
50 (79.4%)
3 (4.8%)
Custom Set Custom Set
45
417 (avg. 9.3)
37 (82.2%)
0 (0.0%)
Two Bucket Two Bucket
84
843 (avg. 10.0)
66 (78.6%)
1 (1.2%)
Zebra Puzzle Zebra Puzzle
71
834 (avg. 11.7)
23 (32.4%)
3 (4.2%)
Binary Search Tree Binary Search Tree
52
226 (avg. 4.3)
45 (86.5%)
2 (3.8%)
D&D Character D&D Character
33
238 (avg. 7.2)
29 (87.9%)
0 (0.0%)
Simple Cipher Simple Cipher
26
187 (avg. 7.2)
25 (96.2%)
0 (0.0%)
REST API REST API
26
233 (avg. 9.0)
17 (65.4%)
0 (0.0%)
Flower Field Flower Field
13
54 (avg. 4.2)
11 (84.6%)
0 (0.0%)
Protein Translation Protein Translation
33
313 (avg. 9.5)
27 (81.8%)
2 (6.1%)
Relative Distance Relative Distance
15
93 (avg. 6.2)
12 (80.0%)
0 (0.0%)
Yacht Yacht
27
183 (avg. 6.8)
21 (77.8%)
1 (3.7%)
Secret Handshake Secret Handshake
19
76 (avg. 4.0)
17 (89.5%)
0 (0.0%)
Sieve Sieve
29
160 (avg. 5.5)
23 (79.3%)
1 (3.4%)
Pig Latin Pig Latin
17
86 (avg. 5.1)
15 (88.2%)
1 (5.9%)
Meetup Meetup
20
165 (avg. 8.3)
17 (85.0%)
0 (0.0%)
Diamond Diamond
30
408 (avg. 13.6)
24 (80.0%)
3 (10.0%)
Spiral Matrix Spiral Matrix
18
112 (avg. 6.2)
16 (88.9%)
0 (0.0%)
Food Chain Food Chain
14
118 (avg. 8.4)
12 (85.7%)
0 (0.0%)
Knapsack Knapsack
18
63 (avg. 3.5)
14 (77.8%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
19
70 (avg. 3.7)
16 (84.2%)
0 (0.0%)
Rotational Cipher Rotational Cipher
22
59 (avg. 2.7)
20 (90.9%)
1 (4.5%)
Swift Scheduling Swift Scheduling
13
190 (avg. 14.6)
10 (76.9%)
1 (7.7%)
Split-Second Stopwatch Split-Second Stopwatch
13
117 (avg. 9.0)
11 (84.6%)
0 (0.0%)
Palindrome Products Palindrome Products
9
33 (avg. 3.7)
8 (88.9%)
0 (0.0%)
Camicia Camicia
4
9 (avg. 2.3)
3 (75.0%)
0 (0.0%)
Hangman Hangman
6
53 (avg. 8.8)
4 (66.7%)
0 (0.0%)
2 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Accumulate Accumulate
713
1,332 (avg. 1.9)
669 (93.8%)
83 (11.6%)
Minesweeper Minesweeper
16
196 (avg. 12.3)
13 (81.3%)
0 (0.0%)
55 unimplemented practice exercises
Affine Cipher Affine Cipher
View dataThe link opens in a new window or tab
Alphametics Alphametics
View dataThe link opens in a new window or tab
Baffling Birthdays Baffling Birthdays
View dataThe link opens in a new window or tab
Book Store Book Store
View dataThe link opens in a new window or tab
Bottle Song Bottle Song
View dataThe link opens in a new window or tab
Change Change
View dataThe link opens in a new window or tab
Clock Clock
View dataThe link opens in a new window or tab
Connect Connect
View dataThe link opens in a new window or tab
Conway's Game of Life Conway's Game of Life
View dataThe link opens in a new window or tab
Crypto Square Crypto Square
View dataThe link opens in a new window or tab
Dominoes Dominoes
View dataThe link opens in a new window or tab
DOT DSL DOT DSL
View dataThe link opens in a new window or tab
Error Handling Error Handling
View dataThe link opens in a new window or tab
Flatten Array Flatten Array
View dataThe link opens in a new window or tab
Forth Forth
View dataThe link opens in a new window or tab
Go Counting Go Counting
View dataThe link opens in a new window or tab
Grep Grep
View dataThe link opens in a new window or tab
High Scores High Scores
View dataThe link opens in a new window or tab
House House
View dataThe link opens in a new window or tab
Intergalactic Transmission Intergalactic Transmission
View dataThe link opens in a new window or tab
ISBN Verifier ISBN Verifier
View dataThe link opens in a new window or tab
Killer Sudoku Helper Killer Sudoku Helper
View dataThe link opens in a new window or tab
Ledger Ledger
View dataThe link opens in a new window or tab
Lens Person Lens Person
View dataThe link opens in a new window or tab
Line Up Line Up
View dataThe link opens in a new window or tab
Linked List Linked List
View dataThe link opens in a new window or tab
Markdown Markdown
View dataThe link opens in a new window or tab
Matrix Matrix
View dataThe link opens in a new window or tab
Micro Blog Micro Blog
View dataThe link opens in a new window or tab
Nth Prime Nth Prime
View dataThe link opens in a new window or tab
OCR Numbers OCR Numbers
View dataThe link opens in a new window or tab
PaaS I/O PaaS I/O
View dataThe link opens in a new window or tab
Perfect Numbers Perfect Numbers
View dataThe link opens in a new window or tab
Piecing It Together Piecing It Together
View dataThe link opens in a new window or tab
Poker Poker
View dataThe link opens in a new window or tab
POV POV
View dataThe link opens in a new window or tab
Prime Factors Prime Factors
View dataThe link opens in a new window or tab
Prism Prism
View dataThe link opens in a new window or tab
Proverb Proverb
View dataThe link opens in a new window or tab
Queen Attack Queen Attack
View dataThe link opens in a new window or tab
Rail Fence Cipher Rail Fence Cipher
View dataThe link opens in a new window or tab
Rational Numbers Rational Numbers
View dataThe link opens in a new window or tab
React React
View dataThe link opens in a new window or tab
Rectangles Rectangles
View dataThe link opens in a new window or tab
Robot Name Robot Name
View dataThe link opens in a new window or tab
Saddle Points Saddle Points
View dataThe link opens in a new window or tab
Satellite Satellite
View dataThe link opens in a new window or tab
Save the Cow Save the Cow
View dataThe link opens in a new window or tab
Simple Linked List Simple Linked List
View dataThe link opens in a new window or tab
State of Tic-Tac-Toe State of Tic-Tac-Toe
View dataThe link opens in a new window or tab
Tournament Tournament
View dataThe link opens in a new window or tab
Tree Building Tree Building
View dataThe link opens in a new window or tab
Variable Length Quantity Variable Length Quantity
View dataThe link opens in a new window or tab
Word Search Word Search
View dataThe link opens in a new window or tab
Zipper Zipper
View dataThe link opens in a new window or tab
2 foregone practice exercises
Bank Account Bank Account
View dataThe link opens in a new window or tab
Parallel Letter Frequency Parallel Letter Frequency
View dataThe link opens in a new window or tab

Test Runner

Learn More

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

Current version: 95aefe3b3dbc9d6c6c7b86ed145922c004c7520b (Takes up to 10 mins to deploy)

Total Test Runner Runs
185,003
Test Run Pass Rate
19.3% (35655)
Test Run Fail Rate
29.6% (54788)
Test Run Error Rate
51.1% (94560)

Representer

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.

Current version: df476c5668e0d74edb271c3ba39bd841c0a74c8a (Takes up to 10 mins to deploy)

Total Representer Runs
46,652
Total Representation Comments Made
3,098
Feedback Given Frequency
6.6%

Analyzer

Learn More

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

Current version: 8ccb730bc48e5743e977fdabc0a72b693e81dd9f (Takes up to 10 mins to deploy)

Total Analyzer Runs
39,160
Total Analysis Comments Made
16,303
Feedback Given Frequency
2.9%