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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))

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Tcl/Tk module T202
Tcl Fundamentals
Exercises, examples and other material relating to training module T202. This topic is presented on public courses Learning to program in Tcl, Tcl Programming, Tcl Programming

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.

Related technical and longer articles
Brackets and Braces in Tcl

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
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 [here].
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,Ruby, Lua, 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 700 books on the subjects on which we teach. These books are available for reference at our training centre.


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