5,054
students have developed their Elm skills on Exercism.

Students
5,054
Submissions
92,559
Mentoring Discussions
2,131

The Elm track needs attention ⚠️

Building

Build

Use your knowledge to build the Elm track itself

Create the 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 20 concepts. Find out more.

Usage statistics

19 concepts being taught
Ba
Basics 1
747 learnt
Ba
Basics 2
611 learnt
Bo
Booleans
421 learnt
Li
Lists
436 learnt
Re
Records
340 learnt
Cu
Custom Types
365 learnt
Tu
Tuples
233 learnt
Ma
Maybe
265 learnt
Re
Result
114 learnt
Pa
Pattern Matching
107 learnt
Le
Let
269 learnt
Di
Dict
58 learnt
Pa
Parsing
21 learnt
Pa
Partial application and function composition
63 learnt
Co
Comparison
33 learnt
Se
Set
20 learnt
Ge
Generics
17 learnt
Op
Opaque Types
10 learnt
Ph
Phantom Types
7 learnt
19 active learning exercises
Started
Attempts
Completions
Mentoring requests
Lucian's Luscious Lasagna Lucian's Luscious Lasagna
858
3,174 (avg. 3.7)
747 (87.1%)
9 (1.0%)
Betty's Bike Shop Betty's Bike Shop
653
4,298 (avg. 6.6)
611 (93.6%)
3 (0.5%)
Annalyn's Infiltration Annalyn's Infiltration
464
3,852 (avg. 8.3)
421 (90.7%)
4 (0.9%)
Tracks on Tracks on Tracks Tracks on Tracks on Tracks
501
7,431 (avg. 14.8)
436 (87.0%)
11 (2.2%)
Bandwagoner Bandwagoner
371
2,968 (avg. 8.0)
340 (91.6%)
5 (1.3%)
Valentines Day Valentines Day
377
1,846 (avg. 4.9)
365 (96.8%)
1 (0.3%)
Tisbury Treasure Hunt Tisbury Treasure Hunt
276
3,794 (avg. 13.7)
233 (84.4%)
3 (1.1%)
Role Playing Game Role Playing Game
281
4,502 (avg. 16.0)
265 (94.3%)
2 (0.7%)
Go Go
154
1,285 (avg. 8.3)
114 (74.0%)
3 (1.9%)
Ticket, Please! Ticket, Please!
123
2,154 (avg. 17.5)
107 (87.0%)
2 (1.6%)
Mario's marvellous lasagna Mario's marvellous lasagna
286
1,073 (avg. 3.8)
269 (94.1%)
1 (0.3%)
Top Scorers Top Scorers
86
1,856 (avg. 21.6)
58 (67.4%)
1 (1.2%)
Paola's Prestigious Pizza Paola's Prestigious Pizza
27
758 (avg. 28.1)
21 (77.8%)
0 (0.0%)
Monster Attack Monster Attack
71
766 (avg. 10.8)
63 (88.7%)
0 (0.0%)
Blorkemon Cards Blorkemon Cards
37
536 (avg. 14.5)
33 (89.2%)
0 (0.0%)
Gotta Snatch'Em All Gotta Snatch'Em All
21
387 (avg. 18.4)
20 (95.2%)
0 (0.0%)
Treasure Chest Treasure Chest
19
118 (avg. 6.2)
17 (89.5%)
0 (0.0%)
Secure Treasure Chest Secure Treasure Chest
12
58 (avg. 4.8)
10 (83.3%)
0 (0.0%)
Treasure Factory Treasure Factory
8
32 (avg. 4.0)
7 (87.5%)
0 (0.0%)

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
79,337
Test Run Pass Rate
18.4% (14607)
Test Run Fail Rate
31.2% (24792)
Test Run Error Rate
50.3% (39938)

Build Analyzers

Learn More

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

Usage statistics

Total Analyzer Runs
8,355
Total Analysis Comments Made
2,098
Feedback Given Frequency
0.9%

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
8,358
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 129 practice exercises. Find out more.

Usage statistics

53 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
3,596
4,410 (avg. 1.2)
3,186 (88.6%)
5 (0.1%)
Two Fer Two Fer
1,194
2,314 (avg. 1.9)
914 (76.5%)
559 (46.8%)
Bob Bob
1,709
5,047 (avg. 3.0)
1,353 (79.2%)
354 (20.7%)
Leap Leap
1,151
2,357 (avg. 2.0)
1,073 (93.2%)
177 (15.4%)
Space Age Space Age
656
1,217 (avg. 1.9)
598 (91.2%)
130 (19.8%)
Sum of Multiples Sum of Multiples
533
2,282 (avg. 4.3)
457 (85.7%)
101 (18.9%)
Accumulate Accumulate
691
1,274 (avg. 1.8)
649 (93.9%)
83 (12.0%)
Grade School Grade School
340
2,203 (avg. 6.5)
286 (84.1%)
75 (22.1%)
Raindrops Raindrops
755
1,830 (avg. 2.4)
728 (96.4%)
79 (10.5%)
Robot Simulator Robot Simulator
264
1,273 (avg. 4.8)
215 (81.4%)
36 (13.6%)
Allergies Allergies
242
884 (avg. 3.7)
197 (81.4%)
38 (15.7%)
Hamming Hamming
488
1,065 (avg. 2.2)
422 (86.5%)
20 (4.1%)
Pangram Pangram
750
1,770 (avg. 2.4)
688 (91.7%)
40 (5.3%)
Isogram Isogram
245
988 (avg. 4.0)
203 (82.9%)
12 (4.9%)
Phone Number Phone Number
307
1,051 (avg. 3.4)
228 (74.3%)
13 (4.2%)
Twelve Days Twelve Days
475
1,061 (avg. 2.2)
300 (63.2%)
92 (19.4%)
Acronym Acronym
182
527 (avg. 2.9)
145 (79.7%)
5 (2.7%)
Anagram Anagram
469
1,096 (avg. 2.3)
426 (90.8%)
31 (6.6%)
Series Series
221
1,006 (avg. 4.6)
186 (84.2%)
5 (2.3%)
Atbash Cipher Atbash Cipher
177
719 (avg. 4.1)
148 (83.6%)
3 (1.7%)
Luhn Luhn
151
783 (avg. 5.2)
103 (68.2%)
3 (2.0%)
Grains Grains
226
480 (avg. 2.1)
187 (82.7%)
3 (1.3%)
All Your Base All Your Base
137
663 (avg. 4.8)
91 (66.4%)
5 (3.6%)
Largest Series Product Largest Series Product
159
479 (avg. 3.0)
126 (79.2%)
2 (1.3%)
Triangle Triangle
524
1,036 (avg. 2.0)
491 (93.7%)
43 (8.2%)
Pythagorean Triplet Pythagorean Triplet
74
594 (avg. 8.0)
49 (66.2%)
1 (1.4%)
Collatz Conjecture Collatz Conjecture
268
463 (avg. 1.7)
208 (77.6%)
3 (1.1%)
Binary Search Binary Search
159
715 (avg. 4.5)
106 (66.7%)
6 (3.8%)
List Ops List Ops
202
481 (avg. 2.4)
167 (82.7%)
8 (4.0%)
Pascal's Triangle Pascal's Triangle
139
329 (avg. 2.4)
97 (69.8%)
3 (2.2%)
Roman Numerals Roman Numerals
131
289 (avg. 2.2)
103 (78.6%)
2 (1.5%)
ETL ETL
249
350 (avg. 1.4)
181 (72.7%)
3 (1.2%)
Nucleotide Count Nucleotide Count
281
454 (avg. 1.6)
240 (85.4%)
6 (2.1%)
Word Count Word Count
365
829 (avg. 2.3)
319 (87.4%)
12 (3.3%)
Strain Strain
413
610 (avg. 1.5)
368 (89.1%)
13 (3.1%)
Say Say
121
560 (avg. 4.6)
89 (73.6%)
2 (1.7%)
Wordy Wordy
52
360 (avg. 6.9)
37 (71.2%)
5 (9.6%)
Difference of Squares Difference of Squares
714
962 (avg. 1.3)
583 (81.7%)
20 (2.8%)
Gigasecond Gigasecond
418
538 (avg. 1.3)
313 (74.9%)
10 (2.4%)
RNA Transcription RNA Transcription
508
829 (avg. 1.6)
407 (80.1%)
19 (3.7%)
Armstrong Numbers Armstrong Numbers
114
328 (avg. 2.9)
92 (80.7%)
3 (2.6%)
Scrabble Score Scrabble Score
399
613 (avg. 1.5)
360 (90.2%)
32 (8.0%)
Run-Length Encoding Run-Length Encoding
267
827 (avg. 3.1)
215 (80.5%)
12 (4.5%)
Transpose Transpose
112
557 (avg. 5.0)
68 (60.7%)
2 (1.8%)
Matching Brackets Matching Brackets
121
364 (avg. 3.0)
85 (70.2%)
6 (5.0%)
Sublist Sublist
225
584 (avg. 2.6)
187 (83.1%)
6 (2.7%)
Bowling Bowling
21
450 (avg. 21.4)
10 (47.6%)
0 (0.0%)
Complex Numbers Complex Numbers
123
1,249 (avg. 10.2)
80 (65.0%)
2 (1.6%)
SGF Parsing SGF Parsing
4
71 (avg. 17.8)
3 (75.0%)
1 (25.0%)
Circular Buffer Circular Buffer
18
209 (avg. 11.6)
12 (66.7%)
1 (5.6%)
Custom Set Custom Set
9
64 (avg. 7.1)
7 (77.8%)
0 (0.0%)
Two Bucket Two Bucket
6
8 (avg. 1.3)
2 (33.3%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
13
169 (avg. 13.0)
3 (23.1%)
0 (0.0%)
76 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
Change Change
Clock Clock
Connect Connect
Crypto Square Crypto Square
D&D Character D&D Character
DOT DSL DOT DSL
Darts Darts
Diamond Diamond
Dominoes Dominoes
Error Handling Error Handling
Flatten Array Flatten Array
Food Chain Food Chain
Forth Forth
Go Counting Go Counting
Grep Grep
Hangman Hangman
High Scores High Scores
House House
ISBN Verifier ISBN Verifier
Killer Sudoku Helper Killer Sudoku Helper
Kindergarten Garden Kindergarten Garden
Knapsack Knapsack
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
Markdown Markdown
Matrix Matrix
Meetup Meetup
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
Perfect Numbers Perfect Numbers
Pig Latin Pig Latin
Poker Poker
Prime Factors Prime Factors
Protein Translation Protein Translation
Proverb Proverb
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 Name Robot Name
Rotational Cipher Rotational Cipher
Saddle Points Saddle Points
Satellite Satellite
Scale Generator Scale Generator
Secret Handshake Secret Handshake
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
Tournament Tournament
Tree Building Tree Building
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Yacht Yacht
Zipper Zipper