Tcl/Tk - Tcl Fundamentals

Tcl Fundamentals - Tcl/Tk module T202

Starting with a first program ("Hello World" in Tcl), we move on to cover command syntax and grouping with quotes, brackets and braces. Amongst the most important commands covered at this early stage are those that let you read from the keyboard, write to the screen and create, display and perform basic operations on variables.

This topic is presented on public course Tcl Basics

Examples from our training material

anno	A trivial Tcl program with comments
anno2	Comments - inline and continuations
gr2	Double quote substitution in Tcl
greet	Reading from the user in Tcl
gry	Variables in Tcl - first use
hddh	Hexadecimal to decimal, and decimal to hex, in Tcl
pricer	Completed simple application in Tcl - pricing tickets

Opentalk forum discussions related to this topic

executable tcl script s creating problem
Tcl loops and conditionals
Backslash sequence inTcl
Accuracy Of Tcl Calculations

Pictures

Tcl trainees come from far and wide
Square brackets and braces in Tcl

Background information

Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from http://www.training-notes.co.uk.

Topics covered in this module

Hello World.
Running environment.
source.
Structure of Tcl Commands.
Running from the command line.
Integration into your system.
Step 1 - First line.
Step 2 - Mark the program as being executable.
Step 3 - Ensure that your program is on the "PATH"..
The comment command and more syntax.
Comments.
More flexible command syntax.
Variables.
Setting up variables.
Referencing variables.
Variable substitution using double quotes.
Reading Input.
fileIds.
Command substitution.
flushing.
The expr command.
Integer v float.

Complete learning

If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page.

Well House Consultants specialise in training courses in Tcl/Tk, Expect,Python, Perl, PHP, and MySQL. We run Private Courses throughout the UK (and beyond for longer courses), and Public Courses at our training centre in Melksham, Wiltshire, England. It's surprisingly cost effective to come on our public courses - even if you live in a different country or continent to us.

We have a technical library of over 600 books on the subjects on which we teach. These books are available for reference at our training centre. Also available is the Opentalk Forum for discussion of technical questions.