COBOL impact and status on Exercism

COBOL

2,355 students

About COBOL

Practice

13 contributors

37 mentors

COBOL Track Management

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

Students

2,355

Submissions

42,745

Mentoring Discussions

The COBOL 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: 40ed16665c4661b5b9cc525fb78c1cb01f831057 (Updates should be instant)

Next goal: Implement at least 40 practice exercises. Find out more.

34 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello, World!

2,005

5,504 (avg. 2.7)

1,396 (69.6%)

0 (0.0%)

Leap

987

9,118 (avg. 9.2)

317 (32.1%)

30 (3.0%)

Yacht

342

6,172 (avg. 18.0)

129 (37.7%)

13 (3.8%)

Pangram

247

2,920 (avg. 11.8)

123 (49.8%)

7 (2.8%)

Isogram

181

1,701 (avg. 9.4)

105 (58.0%)

4 (2.2%)

Rotational Cipher

134

1,983 (avg. 14.8)

86 (64.2%)

5 (3.7%)

RNA Transcription

127

675 (avg. 5.3)

75 (59.1%)

0 (0.0%)

Reverse String

197

1,733 (avg. 8.8)

108 (54.8%)

2 (1.0%)

Bob

122

1,637 (avg. 13.4)

65 (53.3%)

2 (1.6%)

Collatz Conjecture

103

752 (avg. 7.3)

56 (54.4%)

0 (0.0%)

Difference of Squares

510 (avg. 6.1)

43 (51.2%)

0 (0.0%)

Hamming Distance

438 (avg. 4.9)

45 (50.6%)

0 (0.0%)

Two-Fer

498 (avg. 7.1)

49 (70.0%)

1 (1.4%)

Raindrops

698 (avg. 13.7)

38 (74.5%)

3 (5.9%)

Luhn Algorithm

1,566 (avg. 16.3)

43 (44.8%)

1 (1.0%)

Darts

104

586 (avg. 5.6)

52 (50.0%)

1 (1.0%)

Sieve

447 (avg. 14.9)

19 (63.3%)

0 (0.0%)

Armstrong Numbers

127

1,297 (avg. 10.2)

67 (52.8%)

1 (0.8%)

Square Root

184 (avg. 3.0)

41 (66.1%)

2 (3.2%)

Nucleotide Count

221 (avg. 4.9)

36 (80.0%)

0 (0.0%)

Roman Numerals

864 (avg. 18.4)

26 (55.3%)

1 (2.1%)

Triangle

697 (avg. 12.0)

31 (53.4%)

0 (0.0%)

Scrabble Score

258 (avg. 8.3)

24 (77.4%)

0 (0.0%)

Queen Attack

445 (avg. 14.4)

24 (77.4%)

0 (0.0%)

High Scores

430 (avg. 17.9)

10 (41.7%)

0 (0.0%)

Allergies

458 (avg. 14.3)

13 (40.6%)

1 (3.1%)

Acronym

148 (avg. 7.8)

7 (36.8%)

0 (0.0%)

All Your Base

217 (avg. 27.1)

3 (37.5%)

0 (0.0%)

Atbash Cipher

80 (avg. 7.3)

4 (36.4%)

0 (0.0%)

Binary

80 (avg. 8.0)

5 (50.0%)

0 (0.0%)

Circular Buffer

104 (avg. 9.5)

4 (36.4%)

0 (0.0%)

Complex Numbers

47 (avg. 4.3)

4 (36.4%)

0 (0.0%)

Matching Brackets

122 (avg. 8.1)

4 (26.7%)

0 (0.0%)

Pascal's Triangle

155 (avg. 17.2)

3 (33.3%)

0 (0.0%)

96 unimplemented practice exercises

Affine Cipher

Alphametics

Anagram

Bank Account

Binary Search

Binary Search Tree

Book Store

Bottle Song

Bowling

Change

Clock

Connect

Conway's Game of Life

Crypto Square

Custom Set

D&D Character

Diamond

Dominoes

DOT DSL

Eliud's Eggs

Error Handling

ETL

Flatten Array

Food Chain

Forth

Gigasecond

Go Counting

Grade School

Grains

Grep

Hangman

House

ISBN Verifier

Killer Sudoku Helper

Kindergarten Garden

Knapsack

Largest Series Product

Ledger

Lens Person

Linked List

List Ops

Markdown

Matrix

Meetup

Micro Blog

Minesweeper

Nth Prime

OCR Numbers

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Perfect Numbers

Phone Number

Pig Latin

Poker

POV

Prime Factors

Protein Translation

Proverb

Pythagorean Triplet

Rail Fence Cipher

Rational Numbers

React

Rectangles

Resistor Color

Resistor Color Duo

Resistor Color Trio

REST API

Robot Name

Robot Simulator

Run-Length Encoding

Saddle Points

Satellite

Say

Secret Handshake

Series

SGF Parsing

Simple Cipher

Simple Linked List

Space Age

Spiral Matrix

State of Tic-Tac-Toe

Strain

Sublist

Sum of Multiples

Tournament

Transpose

Tree Building

Twelve Days

Two Bucket

Variable Length Quantity

Word Count

Word Search

Wordy

Zebra Puzzle

Zipper

Programming Tags

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

0 tags

Test Runner

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

Current version: bbc4d076ab86ce43aa1860f62c791053b3db2174 (Takes up to 10 mins to deploy)

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

Total Test Runner Runs

42,523

Test Run Pass Rate

15.7% (6680)

Test Run Fail Rate

83.1% (35357)

Test Run Error Rate

1.1% (486)

Representer

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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

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Build an Analyzer for COBOL: 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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The COBOL track needs attention ⚠️

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