Tcl/Tk - A Review of Tcl and Tk Basics

Tcl/Tk module T248

A Review of Tcl and Tk Basics

Exercises, examples and other material relating to training module T248. This topic is presented on public course Tcl/Tk

For trainees who have studied some basic Tcl on their own, or on an earlier course, this module reviews the basics of the language in order to prepare trainees for additional learning on Tk, Expect, other extensions or advanced features of Tcl.

Related technical and longer articles

What makes a good variable name?
Brackets and Braces in Tcl

Articles and tips on this subject		updated
4208	Tcl + Tk (Wish) - an introduction and revision example Whenever I teach Tcl with Tk, I'm delighted to be reminded how easy it is to put together a graphic user interface (GUI) with Tcl. They may not be the world's prettiest, but they're quick, straightforward and functional. And so it was on the final day of our Tcl Programming course last week, when I did ...	2013-11-16
1469	Curley brackets v double quotes - Tcl, Tk, Expect In Tcl, both Curley braces and double quotes can be used to hold a block of program or data together as a single unit / parameter ... but there are differences ... a) Curley braces can stretch over a number of lines, with new lines within the block being simply a part of the block. So they're ideal ...	2007-12-13
1181	Good Programming practise - where to initialise variables It's a good idea to initialise your variables directly before you use them for the first time if you're going to use them as accumulators. By accumulator I mean that you're going to write assignments such as: $n += 4; # Perl incr notepad; # Tcl lappend flcodes [lindex ...	2007-05-11
1174	Installing Tcl and Expect on Solaris 10 - a checklist Hot off the presses from the last couple of days - a check list (and a couple of "Gotcha" notes) concerning the installation of Tcl and Expect on a Solaris 10 system, compiling from scratch were possible. You'll need a C Compiler We used gcc (the Gnu C compiler) and we installed it from Sun standard ...	2007-05-03
1092	Tcl training - often for a larger group There's a different 'metric' for courses in the different languages we teach - PHP programmers come in ones and twos much of the time, but almost all of the Tcl training we do is for larger groups of delegates, in private courses at their place of work. Why is this? Tcl is used as an embedded element ...	2007-02-27

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 [here].

Topics covered in this module

Language constructs.
Basic command syntax.
Variables.
Lists.
Arrays.
Procs.
Regular expressions.
Tcl Commands.
Basic commands.
Loop and control commands.
String handling commands.
List commands.
Array commands.
Handling files.
Other commands in Tcl.
Special variable in Tcl.
Tk Overview.
Widgets.
Geometries.
Events.

Complete learning

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