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Exercises

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27 contributors

231 mentors

9,712
students have developed their R skills on Exercism.

Students

9,712

Submissions

49,003

Mentoring Discussions

1,404

The R track needs attention ⚠️

Building

Build

Use your knowledge to build the R track itself

27 contributors

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

45,636

Test Run Pass Rate

23.1% (10550)

Test Run Fail Rate

75.6% (34479)

Test Run Error Rate

1.3% (607)

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 40 practice exercises. Find out more.

Usage statistics

37 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

4,753

9,803 (avg. 2.1)

3,222 (67.8%)

1 (0.0%)

Two Fer

2,324

10,944 (avg. 4.7)

1,139 (49.0%)

365 (15.7%)

Leap

1,318

4,216 (avg. 3.2)

948 (71.9%)

282 (21.4%)

Raindrops

795

3,574 (avg. 4.5)

563 (70.8%)

153 (19.2%)

Hamming

662

3,063 (avg. 4.6)

492 (74.3%)

147 (22.2%)

Phone Number

398

2,732 (avg. 6.9)

246 (61.8%)

61 (15.3%)

Anagram

308

1,690 (avg. 5.5)

205 (66.6%)

54 (17.5%)

Word Count

255

951 (avg. 3.7)

150 (58.8%)

34 (13.3%)

Rotational Cipher

156

659 (avg. 4.2)

108 (69.2%)

24 (15.4%)

Tournament

154

953 (avg. 6.2)

73 (47.4%)

16 (10.4%)

Difference of Squares

355

592 (avg. 1.7)

278 (78.3%)

43 (12.1%)

Grains

285

582 (avg. 2.0)

220 (77.2%)

35 (12.3%)

Space Age

224

572 (avg. 2.6)

172 (76.8%)

21 (9.4%)

Collatz Conjecture

162

668 (avg. 4.1)

116 (71.6%)

8 (4.9%)

Perfect Numbers

187

625 (avg. 3.3)

137 (73.3%)

23 (12.3%)

Sieve

137

423 (avg. 3.1)

92 (67.2%)

8 (5.8%)

Acronym

150

436 (avg. 2.9)

95 (63.3%)

10 (6.7%)

Fizz Buzz

135

438 (avg. 3.2)

97 (71.9%)

6 (4.4%)

Secret Handshake

118

165 (avg. 1.4)

78 (66.1%)

10 (8.5%)

RNA Transcription

222

442 (avg. 2.0)

162 (73.0%)

20 (9.0%)

ETL

8 (avg. 1.6)

2 (40.0%)

0 (0.0%)

Allergies

104

194 (avg. 1.9)

62 (59.6%)

2 (1.9%)

Luhn

415 (avg. 4.3)

63 (64.9%)

3 (3.1%)

Bob

169

583 (avg. 3.4)

121 (71.6%)

36 (21.3%)

Isogram

105

201 (avg. 1.9)

78 (74.3%)

2 (1.9%)

Pangram

246 (avg. 2.6)

67 (69.8%)

3 (3.1%)

Sum of Multiples

127

276 (avg. 2.2)

93 (73.2%)

23 (18.1%)

Beer Song

292 (avg. 3.2)

59 (65.6%)

0 (0.0%)

Prime Factors

164 (avg. 1.8)

60 (65.2%)

1 (1.1%)

Triangle

314 (avg. 3.5)

50 (54.9%)

1 (1.1%)

Nucleotide Count

332 (avg. 3.5)

60 (62.5%)

1 (1.0%)

Scrabble Score

242 (avg. 2.5)

68 (70.1%)

3 (3.1%)

Diamond

424 (avg. 6.0)

40 (56.3%)

1 (1.4%)

Largest Series Product

333 (avg. 3.8)

59 (67.0%)

6 (6.8%)

Pascal's Triangle

108

449 (avg. 4.2)

56 (51.9%)

7 (6.5%)

Crypto Square

980 (avg. 9.9)

54 (54.5%)

5 (5.1%)

Saddle Points

22 (avg. 4.4)

1 (20.0%)

93 unimplemented practice exercises

Affine Cipher

All Your Base

Alphametics

Armstrong Numbers

Atbash Cipher

Bank Account

Binary Search

Binary Search Tree

Book Store

Bottle Song

Bowling

Change

Circular Buffer

Clock

Complex Numbers

Connect

Custom Set

D&D Character

DOT DSL

Darts

Dominoes

Error Handling

Flatten Array

Food Chain

Forth

Gigasecond

Go Counting

Grade School

Grep

Hangman

High Scores

House

ISBN Verifier

Killer Sudoku Helper

Kindergarten Garden

Knapsack

Ledger

Lens Person

Linked List

List Ops

Markdown

Matching Brackets

Matrix

Meetup

Micro Blog

Minesweeper

Nth Prime

OCR Numbers

POV

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Pig Latin

Poker

Protein Translation

Proverb

Pythagorean Triplet

Queen Attack

REST API

Rail Fence Cipher

Rational Numbers

React

Rectangles

Resistor Color

Resistor Color Duo

Resistor Color Trio

Reverse String

Robot Name

Robot Simulator

Roman Numerals

Run-Length Encoding

SGF Parsing

Satellite

Say

Scale Generator

Series

Simple Cipher

Simple Linked List

Spiral Matrix

Square Root

State of Tic-Tac-Toe

Strain

Sublist

Transpose

Tree Building

Twelve Days

Two Bucket

Variable Length Quantity

Word Search

Wordy

Yacht

Zebra Puzzle

Zipper

Volunteers

jonmcalder

1,978

shanedrabing

1,642

katrinleinweber

1,129

+ 58 more

We 💙 our volunteers

Exercism relies on open-source volunteers to build our language tracks and mentor students.

Become an Exercism Volunteer

9,712 students have developed their R skills on Exercism.

The R track needs attention ⚠️

Build

Build Test Runners

Usage statistics

Build Analyzers

Build Representers

Create Practice Exercises

Usage statistics

We 💙 our volunteers

9,712
students have developed their R skills on Exercism.