Tcl
Tcl
AboutExercisesBuild Status

952
students have developed their Tcl skills on Exercism.

Students
952
Submissions
23,450
Mentoring Discussions
143

The Tcl track needs attention ⚠️

Building

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Use your knowledge to build the Tcl track itself

Build Test Runners

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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
22,969
Test Run Pass Rate
17.7% (4062)
Test Run Fail Rate
74.3% (17075)
Test Run Error Rate
8.0% (1832)

Build Analyzers

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

Next goal: Build an Analyzer. Find out more.

Build Representers

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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.

Create Practice Exercises

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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

122 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
782
1,986 (avg. 2.5)
642 (82.1%)
0 (0.0%)
Two Fer Two Fer
515
4,744 (avg. 9.2)
293 (56.9%)
23 (4.5%)
Resistor Color Resistor Color
326
2,651 (avg. 8.1)
169 (51.8%)
18 (5.5%)
Error Handling Error Handling
186
1,332 (avg. 7.2)
100 (53.8%)
10 (5.4%)
Acronym Acronym
181
1,099 (avg. 6.1)
141 (77.9%)
10 (5.5%)
High Scores High Scores
129
1,061 (avg. 8.2)
75 (58.1%)
6 (4.7%)
Matrix Matrix
66
433 (avg. 6.6)
47 (71.2%)
6 (9.1%)
Series Series
63
741 (avg. 11.8)
50 (79.4%)
6 (9.5%)
Word Count Word Count
70
686 (avg. 9.8)
47 (67.1%)
7 (10.0%)
Hamming Hamming
58
308 (avg. 5.3)
48 (82.8%)
4 (6.9%)
Raindrops Raindrops
90
402 (avg. 4.5)
82 (91.1%)
4 (4.4%)
Isogram Isogram
92
543 (avg. 5.9)
81 (88.0%)
9 (9.8%)
Scrabble Score Scrabble Score
39
213 (avg. 5.5)
34 (87.2%)
5 (12.8%)
Luhn Luhn
39
444 (avg. 11.4)
27 (69.2%)
5 (12.8%)
Clock Clock
32
335 (avg. 10.5)
24 (75.0%)
4 (12.5%)
Tournament Tournament
22
311 (avg. 14.1)
13 (59.1%)
4 (18.2%)
Twelve Days Twelve Days
31
296 (avg. 9.5)
21 (67.7%)
3 (9.7%)
Bank Account Bank Account
17
94 (avg. 5.5)
13 (76.5%)
3 (17.6%)
Gigasecond Gigasecond
33
75 (avg. 2.3)
19 (57.6%)
1 (3.0%)
RNA Transcription RNA Transcription
33
84 (avg. 2.5)
29 (87.9%)
1 (3.0%)
Leap Leap
53
248 (avg. 4.7)
45 (84.9%)
1 (1.9%)
Resistor Color Duo Resistor Color Duo
25
171 (avg. 6.8)
20 (80.0%)
1 (4.0%)
Resistor Color Trio Resistor Color Trio
20
237 (avg. 11.9)
18 (90.0%)
1 (5.0%)
Yacht Yacht
18
100 (avg. 5.6)
14 (77.8%)
0 (0.0%)
Space Age Space Age
61
487 (avg. 8.0)
54 (88.5%)
1 (1.6%)
Pangram Pangram
31
200 (avg. 6.5)
28 (90.3%)
2 (6.5%)
Triangle Triangle
31
214 (avg. 6.9)
19 (61.3%)
1 (3.2%)
Rectangles Rectangles
11
9 (avg. 0.8)
6 (54.5%)
0 (0.0%)
Anagram Anagram
20
93 (avg. 4.7)
17 (85.0%)
0 (0.0%)
Difference of Squares Difference of Squares
28
195 (avg. 7.0)
25 (89.3%)
1 (3.6%)
Sum of Multiples Sum of Multiples
21
143 (avg. 6.8)
15 (71.4%)
0 (0.0%)
Transpose Transpose
14
169 (avg. 12.1)
9 (64.3%)
0 (0.0%)
Word Search Word Search
14
275 (avg. 19.6)
6 (42.9%)
1 (7.1%)
Armstrong Numbers Armstrong Numbers
19
61 (avg. 3.2)
16 (84.2%)
0 (0.0%)
Flatten Array Flatten Array
14
51 (avg. 3.6)
13 (92.9%)
0 (0.0%)
Grains Grains
15
91 (avg. 6.1)
13 (86.7%)
0 (0.0%)
Phone Number Phone Number
15
162 (avg. 10.8)
12 (80.0%)
0 (0.0%)
Saddle Points Saddle Points
9
66 (avg. 7.3)
6 (66.7%)
0 (0.0%)
Nucleotide Count Nucleotide Count
14
36 (avg. 2.6)
12 (85.7%)
0 (0.0%)
ETL ETL
11
26 (avg. 2.4)
8 (72.7%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
12
86 (avg. 7.2)
5 (41.7%)
1 (8.3%)
Collatz Conjecture Collatz Conjecture
20
55 (avg. 2.8)
16 (80.0%)
0 (0.0%)
Darts Darts
14
36 (avg. 2.6)
12 (85.7%)
0 (0.0%)
Sublist Sublist
13
78 (avg. 6.0)
9 (69.2%)
0 (0.0%)
Proverb Proverb
9
50 (avg. 5.6)
7 (77.8%)
0 (0.0%)
Sieve Sieve
13
31 (avg. 2.4)
11 (84.6%)
1 (7.7%)
Palindrome Products Palindrome Products
9
37 (avg. 4.1)
4 (44.4%)
0 (0.0%)
Matching Brackets Matching Brackets
14
79 (avg. 5.6)
7 (50.0%)
0 (0.0%)
Bob Bob
17
165 (avg. 9.7)
12 (70.6%)
0 (0.0%)
Perfect Numbers Perfect Numbers
12
73 (avg. 6.1)
11 (91.7%)
0 (0.0%)
Square Root Square Root
14
37 (avg. 2.6)
10 (71.4%)
0 (0.0%)
Strain Strain
7
14 (avg. 2.0)
7 (100.0%)
0 (0.0%)
Binary Search Binary Search
10
25 (avg. 2.5)
8 (80.0%)
0 (0.0%)
Nth Prime Nth Prime
9
15 (avg. 1.7)
8 (88.9%)
0 (0.0%)
Accumulate Accumulate
9
39 (avg. 4.3)
8 (88.9%)
0 (0.0%)
Two Bucket Two Bucket
7
16 (avg. 2.3)
6 (85.7%)
1 (14.3%)
Alphametics Alphametics
7
6 (avg. 0.9)
3 (42.9%)
0 (0.0%)
All Your Base All Your Base
10
35 (avg. 3.5)
9 (90.0%)
1 (10.0%)
Allergies Allergies
7
24 (avg. 3.4)
7 (100.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
8
35 (avg. 4.4)
7 (87.5%)
0 (0.0%)
Scale Generator Scale Generator
7
8 (avg. 1.1)
5 (71.4%)
0 (0.0%)
Minesweeper Minesweeper
7
13 (avg. 1.9)
6 (85.7%)
0 (0.0%)
Rail Fence Cipher Rail Fence Cipher
7
25 (avg. 3.6)
6 (85.7%)
0 (0.0%)
Robot Simulator Robot Simulator
9
111 (avg. 12.3)
8 (88.9%)
0 (0.0%)
Beer Song Beer Song
8
25 (avg. 3.1)
7 (87.5%)
0 (0.0%)
Pig Latin Pig Latin
7
8 (avg. 1.1)
5 (71.4%)
0 (0.0%)
Protein Translation Protein Translation
7
16 (avg. 2.3)
6 (85.7%)
0 (0.0%)
Dominoes Dominoes
6
5 (avg. 0.8)
3 (50.0%)
0 (0.0%)
Grade School Grade School
8
103 (avg. 12.9)
7 (87.5%)
0 (0.0%)
Secret Handshake Secret Handshake
8
44 (avg. 5.5)
8 (100.0%)
0 (0.0%)
Wordy Wordy
7
41 (avg. 5.9)
5 (71.4%)
0 (0.0%)
List Ops List Ops
7
12 (avg. 1.7)
6 (85.7%)
1 (14.3%)
Atbash Cipher Atbash Cipher
8
26 (avg. 3.3)
8 (100.0%)
0 (0.0%)
Robot Name Robot Name
7
32 (avg. 4.6)
3 (42.9%)
0 (0.0%)
Simple Cipher Simple Cipher
7
5 (avg. 0.7)
4 (57.1%)
0 (0.0%)
Circular Buffer Circular Buffer
7
50 (avg. 7.1)
6 (85.7%)
0 (0.0%)
Crypto Square Crypto Square
7
7 (avg. 1.0)
5 (71.4%)
0 (0.0%)
Simple Linked List Simple Linked List
9
227 (avg. 25.2)
6 (66.7%)
0 (0.0%)
Change Change
5
4 (avg. 0.8)
4 (80.0%)
0 (0.0%)
Satellite Satellite
4
4 (avg. 1.0)
3 (75.0%)
0 (0.0%)
Binary Search Tree Binary Search Tree
5
9 (avg. 1.8)
3 (60.0%)
0 (0.0%)
House House
6
3 (avg. 0.5)
3 (50.0%)
0 (0.0%)
Roman Numerals Roman Numerals
46
210 (avg. 4.6)
38 (82.6%)
2 (4.3%)
Rotational Cipher Rotational Cipher
4
5 (avg. 1.3)
4 (100.0%)
0 (0.0%)
Affine Cipher Affine Cipher
4
6 (avg. 1.5)
2 (50.0%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
5
18 (avg. 3.6)
4 (80.0%)
0 (0.0%)
Largest Series Product Largest Series Product
6
16 (avg. 2.7)
6 (100.0%)
0 (0.0%)
Prime Factors Prime Factors
8
26 (avg. 3.3)
8 (100.0%)
1 (12.5%)
Custom Set Custom Set
6
134 (avg. 22.3)
4 (66.7%)
0 (0.0%)
Linked List Linked List
5
4 (avg. 0.8)
3 (60.0%)
0 (0.0%)
Knapsack Knapsack
5
10 (avg. 2.0)
4 (80.0%)
0 (0.0%)
Poker Poker
6
9 (avg. 1.5)
4 (66.7%)
0 (0.0%)
Queen Attack Queen Attack
5
3 (avg. 0.6)
2 (40.0%)
0 (0.0%)
Spiral Matrix Spiral Matrix
4
5 (avg. 1.3)
2 (50.0%)
0 (0.0%)
Food Chain Food Chain
5
18 (avg. 3.6)
3 (60.0%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
5
17 (avg. 3.4)
3 (60.0%)
0 (0.0%)
Connect Connect
4
4 (avg. 1.0)
2 (50.0%)
0 (0.0%)
Book Store Book Store
5
5 (avg. 1.0)
3 (60.0%)
0 (0.0%)
React React
5
3 (avg. 0.6)
3 (60.0%)
0 (0.0%)
ISBN Verifier ISBN Verifier
8
30 (avg. 3.8)
5 (62.5%)
0 (0.0%)
Complex Numbers Complex Numbers
5
7 (avg. 1.4)
2 (40.0%)
0 (0.0%)
Diamond Diamond
8
60 (avg. 7.5)
3 (37.5%)
0 (0.0%)
Markdown Markdown
7
10 (avg. 1.4)
4 (57.1%)
0 (0.0%)
Meetup Meetup
4
4 (avg. 1.0)
2 (50.0%)
0 (0.0%)
OCR Numbers OCR Numbers
5
5 (avg. 1.0)
1 (20.0%)
0 (0.0%)
Bowling Bowling
5
49 (avg. 9.8)
3 (60.0%)
0 (0.0%)
Grep Grep
7
76 (avg. 10.9)
3 (42.9%)
0 (0.0%)
REST API REST API
6
9 (avg. 1.5)
1 (16.7%)
0 (0.0%)
Zipper Zipper
5
3 (avg. 0.6)
2 (40.0%)
0 (0.0%)
POV POV
6
7 (avg. 1.2)
2 (33.3%)
0 (0.0%)
Say Say
6
16 (avg. 2.7)
4 (66.7%)
0 (0.0%)
Diffie-Hellman Diffie-Hellman
6
8 (avg. 1.3)
4 (66.7%)
0 (0.0%)
D&D Character D&D Character
6
20 (avg. 3.3)
4 (66.7%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
6
6 (avg. 1.0)
2 (33.3%)
0 (0.0%)
Rational Numbers Rational Numbers
6
6 (avg. 1.0)
1 (16.7%)
0 (0.0%)
Parallel Letter Frequency Parallel Letter Frequency
5
3 (avg. 0.6)
2 (40.0%)
0 (0.0%)
Forth Forth
7
10 (avg. 1.4)
1 (14.3%)
0 (0.0%)
DOT DSL DOT DSL
6
6 (avg. 1.0)
1 (16.7%)
0 (0.0%)
Go Counting Go Counting
7
8 (avg. 1.1)
1 (14.3%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
6
4 (avg. 0.7)
3 (50.0%)
0 (0.0%)
Hangman Hangman
7
6 (avg. 0.9)
2 (28.6%)
0 (0.0%)
Killer Sudoku Helper Killer Sudoku Helper
6
17 (avg. 2.8)
3 (50.0%)
1 (16.7%)
1 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Reverse String Reverse String
1
1 (avg. 1.0)
1 (100.0%)
0 (0.0%)
7 unimplemented practice exercises
Bottle Song Bottle Song
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Ledger Ledger
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Lens Person Lens Person
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PaaS I/O PaaS I/O
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SGF Parsing SGF Parsing
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State of Tic-Tac-Toe State of Tic-Tac-Toe
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Tree Building Tree Building
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1 foregone practice exercise
Micro Blog Micro Blog
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