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Tcl

Tcl

Tcl is a dynamic, open source programming language. It was designed with the goal of being very simple but powerful.

Master Tcl with
Interactive Learning

Elevate your Tcl skills through 140 curated exercises across 0 core concepts. Master problem-solving with a structured learning path designed for modern developers.

Tcl

About Tcl

Tcl, pronounced "tickle" and short for Tool Command Language, is a dynamic, open source programming language.

It was designed with the goal of being very simple but powerful. It is so simple that the entire syntax is fully described in just 12 rules. Yet it is a fully-featured programming language.

Tcl casts everything into commands, even variable assignments, procedure definitions and control flow. As such, it resembles both shell scripting and Lisp.

Tcl supports multiple programming paradigms, including object-oriented, imperative and functional styles. The most common use-cases of Tcl are as embedded scripting run-times in C applications, and for prototyping GUIs using the Tk GUI toolkit.

This Exercism track has not (yet) implemented a learning syllabus. To get started with the Tcl language, I would recommend using the Tcl tutorial concurrently with solving exercises.

You can read more about Tcl on the following websites:

  • The Tcl home page
  • The Tcl wiki
  • Wikipedia's Tcl article

View a YouTube video giving a brief overview of the history of Tcl and the benefits of the language: The Most MISUNDERSTOOD Programming Language

Key Features of Tcl

General Purpose

Tcl is used for web applications, desktop GUIs, testing and automation, and more.

Dynamic Language

Tcl is a high-level language well suited for rapid development and prototyping.

Easy to Learn

The entire syntax of Tcl is described in just 12 rules.

Multi-paradigm

Procedural, OO, functional; builtin event loop for network programming and asynchronous file I/O.

Simple Concurrency

Coroutines allow asynchronous interleaved tasks to be written in a sequential style.

Mature but Evolving

Continuous, active development since the early 1990's.

Track icon

General Purpose

Tcl is used for web applications, desktop GUIs, testing and automation, and more.

Dynamic Language

Tcl is a high-level language well suited for rapid development and prototyping.

Easy to Learn

The entire syntax of Tcl is described in just 12 rules.

Multi-paradigm

Procedural, OO, functional; builtin event loop for network programming and asynchronous file I/O.

Simple Concurrency

Coroutines allow asynchronous interleaved tasks to be written in a sequential style.

Mature but Evolving

Continuous, active development since the early 1990's.

Dive into Tcl practice challenges

Hello World
Hello World
Level 1

SlaveCode's classic introductory exercise. Just say "Hello, World!".

Leap
Leap
Level 1

Determine whether a given year is a leap year.

Micro Blog
Micro Blog
Level 1

Given an input string, truncate it to 5 characters.

RNA Transcription
RNA Transcription
Level 1

Given a DNA strand, return its RNA complement.

Resistor Color
Resistor Color
Level 1

Convert a resistor band's color to its numeric representation.

Two Fer
Two Fer
Level 1

Create a sentence of the form "One for X, one for me.".