TCL - Tool Command Language.

Tool Command Language( TCL ), is a general purpose programming language. John Ousterhout of the University of California, Berkeley.

It is a scripting language that helps applications to communicate with each other.
it was initially developed for Unix. it was ported to Windows, DOS,OS/2 and Mac OSX. Tcl is much similar to other unix shell language like Bourne Shell (Sh), the C Shell (csh), the Korn Shell (sh) and Perl.

Features of TCL: -

Reduced development time.
Powerful and simple user interface kit with integration of TK.
Platform independent.
Existing application can be extended with TCL. Also possible to include TCL in C,C++ or Java to TCl or vice-versa.
Have a powerful set of networking functions.
It is open-source, free, and can be used for commercial application without any limit.

Application of TCL

Scalable websites that are often backed by databases.
High performance web servers build with TclHttpd.
Tcl with CGI based websites.
Desktop GUI applications.
Embedded applications.

Namespaces

Namespaces is a container for set of identifiers that is used to group variables and procedures. Namespaces are avaiable from TCL version 8.0.

Namespace can be created using namespace command. A simple example for creating namespace is shown below-

#!/usr/bin/tclsh

namespace eval Math {
    variable result
}

proc Math::Add { a b } {
    set ::Math::result [expr $a+$b]
}

Math::Add 10 20

puts $::Math::result

deepaksy/tcl-tk

TCL - Tool Command Language.

Namespaces