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Concept
Tcl
Summary
Tcl (pronounced "tickle" or as an initialism) is a high-level, general-purpose, interpreted, dynamic programming language. It was designed with the goal of being very simple but powerful. Tcl casts everything into the mold of a command, even programming constructs like variable assignment and procedure definition. Tcl supports multiple programming paradigms, including object-oriented, imperative, functional, and procedural styles.
It is commonly used embedded into C applications, for rapid prototyping, scripted applications, GUIs, and testing. Tcl interpreters are available for many operating systems, allowing Tcl code to run on a wide variety of systems. Because Tcl is a very compact language, it is used on embedded systems platforms, both in its full form and in several other small-footprint versions.
The popular combination of Tcl with the Tk extension is referred to as Tcl/Tk (pronounced "tickle teak" or as an initialism) and enables building a graphical user interface (GUI) natively in Tcl. Tcl/Tk is included in the standard Python installation in the form of Tkinter.
The Tcl programming language was created in the spring of 1988 by John Ousterhout while he was working at the University of California, Berkeley. Originally "born out of frustration", according to the author, with programmers devising their own languages for extending electronic design automation (EDA) software and, more specifically, the VLSI design tool Magic, which was a professional focus for John at the time. Later Tcl gained acceptance on its own. Ousterhout was awarded the ACM Software System Award in 1997 for Tcl/Tk.
The name originally comes from Tool Command Language, but is conventionally written Tcl rather than TCL.
Tcl conferences and workshops are held in both the United States and Europe.
Tcl's features include
All operations are commands, including language structures. They are written in prefix notation.
Commands commonly accept a variable number of arguments (are variadic).
Everything can be dynamically redefined and overridden.
Official source
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