Kotlin impact and status on Exercism

Kotlin

32,077 students

About Kotlin

Practice

76 contributors

493 mentors

Kotlin Track Management

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

Students

32,077

Submissions

168,352

Mentoring Discussions

5,643

The Kotlin track needs attention ⚠️

Building

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: 00147edb892d5d2519daada2191ccd49fb3f4c7f (Updates should be instant)

Next goal: Implement 131 practice exercises. Find out more.

88 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

17,098

22,010 (avg. 1.3)

12,522 (73.2%)

13 (0.1%)

Acronym

1,725

4,243 (avg. 2.5)

1,247 (72.3%)

42 (2.4%)

Armstrong Numbers

651

1,792 (avg. 2.8)

517 (79.4%)

18 (2.8%)

Circular Buffer

182

591 (avg. 3.2)

84 (46.2%)

5 (2.7%)

Crypto Square

362

737 (avg. 2.0)

229 (63.3%)

8 (2.2%)

Custom Set

555

1,211 (avg. 2.2)

360 (64.9%)

9 (1.6%)

D&D Character

1,091

1,657 (avg. 1.5)

686 (62.9%)

18 (1.6%)

Darts

591

1,381 (avg. 2.3)

428 (72.4%)

7 (1.2%)

Difference of Squares

2,103

4,445 (avg. 2.1)

1,800 (85.6%)

255 (12.1%)

Gigasecond

3,892

8,731 (avg. 2.2)

2,827 (72.6%)

496 (12.7%)

Hamming

5,565

14,256 (avg. 2.6)

4,118 (74.0%)

897 (16.1%)

Leap

1,422

1,963 (avg. 1.4)

1,100 (77.4%)

38 (2.7%)

Pangram

2,603

3,824 (avg. 1.5)

2,068 (79.4%)

98 (3.8%)

Perfect Numbers

642

1,064 (avg. 1.7)

539 (84.0%)

12 (1.9%)

Protein Translation

120

846 (avg. 7.1)

100 (83.3%)

4 (3.3%)

RNA Transcription

2,138

2,997 (avg. 1.4)

1,842 (86.2%)

72 (3.4%)

Raindrops

1,766

2,665 (avg. 1.5)

1,455 (82.4%)

74 (4.2%)

Resistor Color

1,085

1,575 (avg. 1.5)

913 (84.1%)

14 (1.3%)

Resistor Color Duo

936

1,409 (avg. 1.5)

776 (82.9%)

9 (1.0%)

Resistor Color Trio

724

1,242 (avg. 1.7)

528 (72.9%)

8 (1.1%)

Reverse String

1,988

2,137 (avg. 1.1)

1,469 (73.9%)

17 (0.9%)

Run-Length Encoding

388

702 (avg. 1.8)

275 (70.9%)

8 (2.1%)

Scale Generator

280

429 (avg. 1.5)

161 (57.5%)

1 (0.4%)

Scrabble Score

2,962

6,564 (avg. 2.2)

2,539 (85.7%)

409 (13.8%)

Secret Handshake

1,719

4,222 (avg. 2.5)

1,321 (76.8%)

219 (12.7%)

Space Age

996

1,473 (avg. 1.5)

832 (83.5%)

18 (1.8%)

Transpose

664

1,316 (avg. 2.0)

367 (55.3%)

7 (1.1%)

Two Fer

8,985

26,958 (avg. 3.0)

6,341 (70.6%)

1,631 (18.2%)

Yacht

264

583 (avg. 2.2)

196 (74.2%)

4 (1.5%)

Affine Cipher

140

255 (avg. 1.8)

92 (65.7%)

0 (0.0%)

All Your Base

216

437 (avg. 2.0)

141 (65.3%)

1 (0.5%)

Allergies

425

628 (avg. 1.5)

315 (74.1%)

4 (0.9%)

Atbash Cipher

346

505 (avg. 1.5)

281 (81.2%)

3 (0.9%)

Bank Account

659

787 (avg. 1.2)

509 (77.2%)

71 (10.8%)

Beer Song

539

842 (avg. 1.6)

404 (75.0%)

19 (3.5%)

Binary Search

531

935 (avg. 1.8)

416 (78.3%)

42 (7.9%)

Binary Search Tree

152

237 (avg. 1.6)

94 (61.8%)

1 (0.7%)

Bob

634

1,070 (avg. 1.7)

490 (77.3%)

19 (3.0%)

Bowling

172 (avg. 5.7)

20 (66.7%)

1 (3.3%)

Collatz Conjecture

415

563 (avg. 1.4)

333 (80.2%)

10 (2.4%)

Diamond

690

935 (avg. 1.4)

491 (71.2%)

21 (3.0%)

ETL

321

405 (avg. 1.3)

266 (82.9%)

6 (1.9%)

Flatten Array

1,070

2,046 (avg. 1.9)

861 (80.5%)

93 (8.7%)

Forth

221

370 (avg. 1.7)

119 (53.8%)

7 (3.2%)

Grade School

241

342 (avg. 1.4)

180 (74.7%)

5 (2.1%)

Grains

453

774 (avg. 1.7)

366 (80.8%)

8 (1.8%)

ISBN Verifier

424

672 (avg. 1.6)

327 (77.1%)

6 (1.4%)

Isogram

1,177

1,652 (avg. 1.4)

962 (81.7%)

53 (4.5%)

Kindergarten Garden

164

213 (avg. 1.3)

124 (75.6%)

1 (0.6%)

Knapsack

100

220 (avg. 2.2)

58 (58.0%)

1 (1.0%)

Largest Series Product

653

1,023 (avg. 1.6)

498 (76.3%)

12 (1.8%)

Linked List

562

847 (avg. 1.5)

420 (74.7%)

49 (8.7%)

Luhn

814

1,230 (avg. 1.5)

607 (74.6%)

14 (1.7%)

Matching Brackets

257

404 (avg. 1.6)

193 (75.1%)

5 (1.9%)

Matrix

1,798

3,635 (avg. 2.0)

1,334 (74.2%)

165 (9.2%)

Minesweeper

328

380 (avg. 1.2)

199 (60.7%)

4 (1.2%)

Nth Prime

375

556 (avg. 1.5)

296 (78.9%)

7 (1.9%)

Nucleotide Count

524

749 (avg. 1.4)

424 (80.9%)

15 (2.9%)

Pascal's Triangle

232

284 (avg. 1.2)

175 (75.4%)

1 (0.4%)

Phone Number

542

987 (avg. 1.8)

423 (78.0%)

9 (1.7%)

Pig Latin

858

1,030 (avg. 1.2)

510 (59.4%)

24 (2.8%)

Prime Factors

224

391 (avg. 1.7)

159 (71.0%)

0 (0.0%)

Rail Fence Cipher

188

254 (avg. 1.4)

116 (61.7%)

1 (0.5%)

Robot Name

766

1,989 (avg. 2.6)

591 (77.2%)

78 (10.2%)

Robot Simulator

239

352 (avg. 1.5)

166 (69.5%)

2 (0.8%)

Roman Numerals

411

528 (avg. 1.3)

304 (74.0%)

8 (1.9%)

Rotational Cipher

538

1,048 (avg. 1.9)

458 (85.1%)

61 (11.3%)

Saddle Points

953

1,871 (avg. 2.0)

652 (68.4%)

123 (12.9%)

Say

165

229 (avg. 1.4)

105 (63.6%)

1 (0.6%)

Series

378

498 (avg. 1.3)

306 (81.0%)

10 (2.6%)

Sieve

441

617 (avg. 1.4)

346 (78.5%)

3 (0.7%)

Spiral Matrix

234

275 (avg. 1.2)

161 (68.8%)

1 (0.4%)

Sum of Multiples

633

876 (avg. 1.4)

477 (75.4%)

8 (1.3%)

Triangle

1,409

3,483 (avg. 2.5)

1,134 (80.5%)

176 (12.5%)

Word Count

984

2,107 (avg. 2.1)

763 (77.5%)

81 (8.2%)

Wordy

267

438 (avg. 1.6)

160 (59.9%)

4 (1.5%)

Anagram

969

1,483 (avg. 1.5)

731 (75.4%)

39 (4.0%)

Change

325

404 (avg. 1.2)

152 (46.8%)

9 (2.8%)

Clock

197

335 (avg. 1.7)

137 (69.5%)

1 (0.5%)

Complex Numbers

259

388 (avg. 1.5)

170 (65.6%)

5 (1.9%)

Diffie-Hellman

170

184 (avg. 1.1)

99 (58.2%)

1 (0.6%)

Dominoes

153

199 (avg. 1.3)

77 (50.3%)

3 (2.0%)

List Ops

283

367 (avg. 1.3)

143 (50.5%)

1 (0.4%)

Meetup

254

362 (avg. 1.4)

163 (64.2%)

0 (0.0%)

React

301

403 (avg. 1.3)

117 (38.9%)

6 (2.0%)

Simple Cipher

213

289 (avg. 1.4)

124 (58.2%)

1 (0.5%)

Sublist

232

380 (avg. 1.6)

154 (66.4%)

3 (1.3%)

Zebra Puzzle

178

162 (avg. 0.9)

69 (38.8%)

1 (0.6%)

4 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Accumulate

118 (avg. 1.4)

84 (97.7%)

7 (8.1%)

Binary

46 (avg. 1.4)

32 (94.1%)

0 (0.0%)

Hexadecimal

29 (avg. 1.1)

25 (96.2%)

1 (3.8%)

Strain

36 (avg. 1.3)

27 (96.4%)

0 (0.0%)

43 unimplemented practice exercises

Alphametics

Book Store

Bottle Song

Connect

Conway's Game of Life

DOT DSL

Eliud's Eggs

Error Handling

Food Chain

Go Counting

Grep

Hangman

High Scores

House

Killer Sudoku Helper

Ledger

Lens Person

Markdown

Micro Blog

OCR Numbers

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Poker

POV

Proverb

Pythagorean Triplet

Queen Attack

Rational Numbers

Rectangles

REST API

Satellite

SGF Parsing

Simple Linked List

Square Root

State of Tic-Tac-Toe

Tournament

Tree Building

Twelve Days

Two Bucket

Variable Length Quantity

View data

Word Search

View data

Zipper

View data

Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

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: 8da657138c7ddd0785fe3a6157b76ba13e48118a (Takes up to 10 mins to deploy)

Total Test Runner Runs

133,627

Test Run Pass Rate

41.7% (55749)

Test Run Fail Rate

15.3% (20431)

Test Run Error Rate

43.0% (57447)

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.

Next goal: Build a Representer. Find out more.

Analyzer

Learn More

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

Next goal: Build an Analyzer. Find out more.

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