Tcl
Tcl
AboutExercisesBuild Status

706
students have developed their Tcl skills on Exercism.

Students
706
Submissions
16,721
Mentoring Discussions
124

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
16,254
Test Run Pass Rate
16.7% (2721)
Test Run Fail Rate
74.3% (12071)
Test Run Error Rate
9.0% (1462)

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
530
1,522 (avg. 2.9)
419 (79.1%)
0 (0.0%)
Two Fer Two Fer
346
3,460 (avg. 10.0)
186 (53.8%)
21 (6.1%)
Resistor Color Resistor Color
222
1,690 (avg. 7.6)
95 (42.8%)
17 (7.7%)
Error Handling Error Handling
122
838 (avg. 6.9)
63 (51.6%)
10 (8.2%)
Acronym Acronym
93
643 (avg. 6.9)
66 (71.0%)
9 (9.7%)
High Scores High Scores
83
708 (avg. 8.5)
44 (53.0%)
6 (7.2%)
Matrix Matrix
54
332 (avg. 6.1)
38 (70.4%)
6 (11.1%)
Series Series
49
589 (avg. 12.0)
39 (79.6%)
5 (10.2%)
Word Count Word Count
47
461 (avg. 9.8)
33 (70.2%)
6 (12.8%)
Hamming Hamming
34
215 (avg. 6.3)
31 (91.2%)
4 (11.8%)
Raindrops Raindrops
36
182 (avg. 5.1)
34 (94.4%)
4 (11.1%)
Isogram Isogram
39
231 (avg. 5.9)
34 (87.2%)
4 (10.3%)
Scrabble Score Scrabble Score
30
192 (avg. 6.4)
28 (93.3%)
5 (16.7%)
Luhn Luhn
29
325 (avg. 11.2)
22 (75.9%)
4 (13.8%)
Clock Clock
24
260 (avg. 10.8)
19 (79.2%)
4 (16.7%)
Tournament Tournament
20
308 (avg. 15.4)
12 (60.0%)
4 (20.0%)
Twelve Days Twelve Days
25
252 (avg. 10.1)
18 (72.0%)
3 (12.0%)
Bank Account Bank Account
15
93 (avg. 6.2)
11 (73.3%)
3 (20.0%)
Gigasecond Gigasecond
29
46 (avg. 1.6)
16 (55.2%)
1 (3.4%)
RNA Transcription RNA Transcription
29
75 (avg. 2.6)
26 (89.7%)
1 (3.4%)
Leap Leap
31
158 (avg. 5.1)
28 (90.3%)
1 (3.2%)
Resistor Color Duo Resistor Color Duo
18
126 (avg. 7.0)
15 (83.3%)
1 (5.6%)
Resistor Color Trio Resistor Color Trio
15
210 (avg. 14.0)
14 (93.3%)
1 (6.7%)
Yacht Yacht
15
90 (avg. 6.0)
11 (73.3%)
0 (0.0%)
Space Age Space Age
15
70 (avg. 4.7)
13 (86.7%)
1 (6.7%)
Pangram Pangram
25
181 (avg. 7.2)
23 (92.0%)
0 (0.0%)
Triangle Triangle
24
176 (avg. 7.3)
15 (62.5%)
1 (4.2%)
Rectangles Rectangles
10
8 (avg. 0.8)
5 (50.0%)
0 (0.0%)
Anagram Anagram
18
86 (avg. 4.8)
15 (83.3%)
0 (0.0%)
Difference of Squares Difference of Squares
16
95 (avg. 5.9)
14 (87.5%)
0 (0.0%)
Sum of Multiples Sum of Multiples
17
134 (avg. 7.9)
12 (70.6%)
0 (0.0%)
Transpose Transpose
13
168 (avg. 12.9)
8 (61.5%)
0 (0.0%)
Word Search Word Search
13
275 (avg. 21.2)
6 (46.2%)
1 (7.7%)
Armstrong Numbers Armstrong Numbers
14
44 (avg. 3.1)
13 (92.9%)
0 (0.0%)
Flatten Array Flatten Array
13
49 (avg. 3.8)
12 (92.3%)
0 (0.0%)
Grains Grains
12
82 (avg. 6.8)
11 (91.7%)
0 (0.0%)
Phone Number Phone Number
13
158 (avg. 12.2)
11 (84.6%)
0 (0.0%)
Saddle Points Saddle Points
9
66 (avg. 7.3)
6 (66.7%)
0 (0.0%)
Nucleotide Count Nucleotide Count
9
20 (avg. 2.2)
8 (88.9%)
0 (0.0%)
ETL ETL
8
9 (avg. 1.1)
6 (75.0%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
11
82 (avg. 7.5)
5 (45.5%)
1 (9.1%)
Collatz Conjecture Collatz Conjecture
14
24 (avg. 1.7)
12 (85.7%)
0 (0.0%)
Darts Darts
10
17 (avg. 1.7)
9 (90.0%)
0 (0.0%)
Sublist Sublist
12
65 (avg. 5.4)
8 (66.7%)
0 (0.0%)
Proverb Proverb
7
6 (avg. 0.9)
5 (71.4%)
0 (0.0%)
Sieve Sieve
11
26 (avg. 2.4)
9 (81.8%)
1 (9.1%)
Palindrome Products Palindrome Products
9
37 (avg. 4.1)
4 (44.4%)
0 (0.0%)
Matching Brackets Matching Brackets
11
72 (avg. 6.5)
7 (63.6%)
0 (0.0%)
Bob Bob
12
94 (avg. 7.8)
9 (75.0%)
0 (0.0%)
Perfect Numbers Perfect Numbers
9
56 (avg. 6.2)
9 (100.0%)
0 (0.0%)
Square Root Square Root
11
27 (avg. 2.5)
8 (72.7%)
0 (0.0%)
Strain Strain
7
14 (avg. 2.0)
7 (100.0%)
0 (0.0%)
Binary Search Binary Search
8
16 (avg. 2.0)
7 (87.5%)
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
9
33 (avg. 3.7)
8 (88.9%)
0 (0.0%)
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
24 (avg. 3.0)
6 (75.0%)
0 (0.0%)
Pig Latin Pig Latin
7
8 (avg. 1.1)
5 (71.4%)
0 (0.0%)
Protein Translation Protein Translation
5
11 (avg. 2.2)
5 (100.0%)
0 (0.0%)
Dominoes Dominoes
6
5 (avg. 0.8)
3 (50.0%)
0 (0.0%)
Grade School Grade School
6
84 (avg. 14.0)
6 (100.0%)
0 (0.0%)
Secret Handshake Secret Handshake
7
41 (avg. 5.9)
7 (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
6
32 (avg. 5.3)
3 (50.0%)
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
5
3 (avg. 0.6)
3 (60.0%)
0 (0.0%)
Roman Numerals Roman Numerals
5
7 (avg. 1.4)
4 (80.0%)
0 (0.0%)
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
5
13 (avg. 2.6)
5 (100.0%)
0 (0.0%)
Prime Factors Prime Factors
7
17 (avg. 2.4)
6 (85.7%)
1 (14.3%)
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
2 (avg. 0.4)
2 (40.0%)
0 (0.0%)
Spiral Matrix Spiral Matrix
4
4 (avg. 1.0)
2 (50.0%)
0 (0.0%)
Food Chain Food Chain
5
17 (avg. 3.4)
3 (60.0%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
5
16 (avg. 3.2)
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
7
30 (avg. 4.3)
5 (71.4%)
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
6
9 (avg. 1.5)
3 (50.0%)
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
5
3 (avg. 0.6)
2 (40.0%)
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
6
6 (avg. 1.0)
2 (33.3%)
0 (0.0%)
Killer Sudoku Helper Killer Sudoku Helper
5
16 (avg. 3.2)
3 (60.0%)
1 (20.0%)
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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