Tcl is a general purpose multi-paradigm system programming language. It is a scripting language that aims at providing the ability for applications to communicate with each other.
On the other hand, Tk is a cross platform widget toolkit used for building GUI in many languages.
This tutorial covers various topics ranging from the basics of the Tcl/Tk to its scope in various applications.
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* Features:
# Quick and Easy Navigation
# Very simple User Interface
# One click share for your friend
# Free app
Good luck!