Tcl Training in Bangalore


In this part of the Tcl tutorial, we will introduce the Tcl programming language.

The goal of this tutorial is to get you started with the Tcl programming language. The tutorial covers the core of the Tcl language, namely variables, lists, arrays, control structures, and other core features. It is not a complete coverage of the language. It is a quick, introductory material. The tutorial was created on Ubuntu Linux.

Tcl logo Tcl is a string based scripting language. The source code is compiled into bytecode, which is later interpreted by the Tcl interpreter. It was created by John Osterhout in 1988. The purpose was to create a language which is easily embeddable into applications. But it is often used outside its original area. The language is commonly used for rapid prototyping, scripted applications, GUIs, and testing. The Tcl stands for tool command language, where the source code of a Tcl script consists of commands.

Tcl is a procedural language. It has some functional features. OOP was added in Tcl verstion 8.6.

The official web site for both Tcl and its Tk GUI toolkit is

There are hundreds of programming languages in use today. Tcl does not belong to the most popular ones. It has its own niche where it used. For instance, rapid prototyping, testing, and database interaction.
Interactive interpreter

We can run Tcl commands in a script or in an interactive interpreter. In this tutorial, we will use the interactive Tcl session to demonstrate some smaller code fragments. Larger code examples are to be put in Tcl scripts.

The tclsh is a shell-like application that reads Tcl commands from its standard input or from a file and evaluates them. If invoked with no arguments then it runs interactively, reading Tcl commands from standard input and printing command results and error messages to standard output.

Tcl/Tk Training Course Benefits

Tcl /Tk is an excellent scripting language for creating cross-platform GUI programs. Our three day, hands-on training class is designed to give you a comprehensive introduction to Tcl/Tk.

Tcl/Tk Training Prerequisites

Programming experience in a high-level language

Tcl/Tk Training - What You'll Learn

  • Day 1
    • introduction to Tcl/Tk using hello, world!
    • scalar data type
    • command evaluation
    • control flow commands
    • subroutines (a.k.a. procs)
    • Tk basics
    • Tk widgets, part I
    • frames
    • pack command
  • Day 2
    • list data type, list commands
    • string commands
    • regular expressions
    • array data type, array commands
    • TK widgets, part II
  • Day 3
    • file i/o
    • sourcing other files
    • command line arguments
    • subprocesses with eval and open
    • more on geometry managers
    • more Tk

Tcl/Tk Training Course Materials

Students will receive the following valuable materials:

  • Course Participant Guide
  • a copy of "Practical Programming with Tcl/Tk"

Customize Tcl/Tk Training

Here are some ways to tailor this class to your specific needs.

  • extend the class to four or five days, adding advanced topics
  • shorten the class to as little as two days
  • add or remove specific topics

Don't hesitate to let us know how we can assist you or your company.

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