11,373
students have developed their R skills on Exercism.

Students
11,373
Submissions
68,430
Mentoring Discussions
1,458

The R track needs attention ⚠️

Building

Build

Use your knowledge to build the R 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.

Next goal: Get Test Runners to Version 2. R is currently utilising a Version 1 Test Runner. Find out more.

Usage statistics

Total Test Runner Runs
65,086
Test Run Pass Rate
22.6% (14702)
Test Run Fail Rate
76.3% (49651)
Test Run Error Rate
1.1% (733)

Build Analyzers

Learn More

Build an Analyzer for R: 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 at least 50 practice exercises. Find out more.

Usage statistics

40 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
5,943
12,630 (avg. 2.1)
4,102 (69.0%)
1 (0.0%)
Two Fer Two Fer
2,962
15,036 (avg. 5.1)
1,445 (48.8%)
379 (12.8%)
Leap Leap
1,652
5,824 (avg. 3.5)
1,198 (72.5%)
291 (17.6%)
Darts Darts
197
725 (avg. 3.7)
155 (78.7%)
8 (4.1%)
Raindrops Raindrops
1,004
4,930 (avg. 4.9)
733 (73.0%)
157 (15.6%)
Hamming Hamming
836
4,353 (avg. 5.2)
636 (76.1%)
150 (17.9%)
Phone Number Phone Number
517
4,094 (avg. 7.9)
337 (65.2%)
63 (12.2%)
Anagram Anagram
381
2,589 (avg. 6.8)
261 (68.5%)
58 (15.2%)
Word Count Word Count
345
1,423 (avg. 4.1)
211 (61.2%)
35 (10.1%)
Rotational Cipher Rotational Cipher
201
1,041 (avg. 5.2)
141 (70.1%)
24 (11.9%)
Tournament Tournament
204
1,273 (avg. 6.2)
103 (50.5%)
19 (9.3%)
Difference of Squares Difference of Squares
417
755 (avg. 1.8)
335 (80.3%)
43 (10.3%)
Grains Grains
335
787 (avg. 2.3)
264 (78.8%)
36 (10.7%)
Space Age Space Age
267
866 (avg. 3.2)
213 (79.8%)
22 (8.2%)
Collatz Conjecture Collatz Conjecture
204
1,001 (avg. 4.9)
152 (74.5%)
8 (3.9%)
Perfect Numbers Perfect Numbers
216
739 (avg. 3.4)
165 (76.4%)
23 (10.6%)
Sieve Sieve
158
488 (avg. 3.1)
109 (69.0%)
8 (5.1%)
Acronym Acronym
178
658 (avg. 3.7)
116 (65.2%)
10 (5.6%)
Fizz Buzz Fizz Buzz
182
672 (avg. 3.7)
140 (76.9%)
8 (4.4%)
Secret Handshake Secret Handshake
139
238 (avg. 1.7)
93 (66.9%)
10 (7.2%)
RNA Transcription RNA Transcription
247
541 (avg. 2.2)
182 (73.7%)
20 (8.1%)
ETL ETL
60
152 (avg. 2.5)
35 (58.3%)
1 (1.7%)
Allergies Allergies
127
274 (avg. 2.2)
77 (60.6%)
2 (1.6%)
Luhn Luhn
117
526 (avg. 4.5)
78 (66.7%)
3 (2.6%)
Bob Bob
204
832 (avg. 4.1)
147 (72.1%)
36 (17.6%)
Isogram Isogram
131
282 (avg. 2.2)
101 (77.1%)
3 (2.3%)
Pangram Pangram
121
332 (avg. 2.7)
86 (71.1%)
3 (2.5%)
Sum of Multiples Sum of Multiples
172
412 (avg. 2.4)
129 (75.0%)
25 (14.5%)
Beer Song Beer Song
106
372 (avg. 3.5)
71 (67.0%)
0 (0.0%)
Prime Factors Prime Factors
118
293 (avg. 2.5)
81 (68.6%)
1 (0.8%)
Triangle Triangle
123
479 (avg. 3.9)
65 (52.8%)
1 (0.8%)
Nucleotide Count Nucleotide Count
123
405 (avg. 3.3)
80 (65.0%)
1 (0.8%)
Scrabble Score Scrabble Score
120
299 (avg. 2.5)
86 (71.7%)
3 (2.5%)
Diamond Diamond
88
500 (avg. 5.7)
52 (59.1%)
1 (1.1%)
Largest Series Product Largest Series Product
128
488 (avg. 3.8)
87 (68.0%)
7 (5.5%)
Pascal's Triangle Pascal's Triangle
130
500 (avg. 3.8)
73 (56.2%)
7 (5.4%)
Crypto Square Crypto Square
122
1,305 (avg. 10.7)
70 (57.4%)
5 (4.1%)
Saddle Points Saddle Points
46
139 (avg. 3.0)
31 (67.4%)
2 (4.3%)
Armstrong Numbers Armstrong Numbers
25
80 (avg. 3.2)
24 (96.0%)
1 (4.0%)
Queen Attack Queen Attack
20
87 (avg. 4.4)
13 (65.0%)
0 (0.0%)
90 unimplemented practice exercises
Affine Cipher Affine Cipher
All Your Base All Your Base
Alphametics Alphametics
Atbash Cipher Atbash Cipher
Bank Account Bank Account
Binary Search Binary Search
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Change Change
Circular Buffer Circular Buffer
Clock Clock
Complex Numbers Complex Numbers
Connect Connect
Custom Set Custom Set
D&D Character D&D Character
DOT DSL DOT DSL
Dominoes Dominoes
Error Handling Error Handling
Flatten Array Flatten Array
Food Chain Food Chain
Forth Forth
Gigasecond Gigasecond
Go Counting Go Counting
Grade School Grade School
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
List Ops List Ops
Markdown Markdown
Matching Brackets Matching Brackets
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
Pig Latin Pig Latin
Poker Poker
Protein Translation Protein Translation
Proverb Proverb
Pythagorean Triplet Pythagorean Triplet
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
Robot Simulator Robot Simulator
Roman Numerals Roman Numerals
Run-Length Encoding Run-Length Encoding
SGF Parsing SGF Parsing
Satellite Satellite
Say Say
Scale Generator Scale Generator
Series Series
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
Strain Strain
Sublist Sublist
Transpose Transpose
Tree Building Tree Building
Twelve Days Twelve Days
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Search Word Search
Wordy Wordy
Yacht Yacht
Zebra Puzzle Zebra Puzzle
Zipper Zipper