Tcl (programming language)

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Export map as:

Research this topic

Explore the main themes, entities and connections around Tcl (programming language). Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Features

Prefix notation Variadic Data types Strings Source code

26 related topics

Syntax and fundamental semantics

Newline Library Standard output Comment Line continuation

28 related topics

Extension packages

Expect API Windows XP Qt X11

17 related topics

History

John Ousterhout University of California, Berkeley Electronic design automation VLSI Magic

9 related topics

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Designed by: John Ousterhout
Developer: Tcl Core Team
Filename extensions: .tcl, .tbc
First appeared: 1988; 38 years ago (1988)
Implementation language: C, Tcl
License: BSD-style

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Tickle
High-level High-level programming language
General-purpose General-purpose programming language
Interpreted Interpreter (computing)
Dynamic programming language
Command Command (computing)
Programming paradigms Programming paradigm
Object-oriented Object-oriented programming
Imperative Imperative programming
Functional Functional programming
Procedural Procedural programming
Rapid prototyping Rapid application development
Operating systems Operating system
Embedded systems Embedded system
Tk Tk (software)
Graphical user interface
Python Python (programming language)
Tkinter

History

Features

Prefix notation
Variadic
Data types Data type
Strings String (computer science)
Source code
Mixins Mixin
Event-driven interface Event-driven programming
Sockets Network socket
Files Computer file
Scope Scope (computer science)
Extensibility
C++
Java Java (programming language)
Interpreted language
Bytecode
Unicode
Regular expressions Regular expression
Cross-platform
Windows API
Unix
Linux
Macintosh
GUI
BSD license
Nathaniel Borenstein
Marshall Rose

Syntax and fundamental semantics

Newline
Library Library (computing)
Standard output Standard streams
Comment Comment (computer programming)
Line continuation
Lisp Lisp (programming language)
Unix command shells Bourne shell
Variadic Variadic function
Immutable Immutable object
If If-then-else
While While loop
Foreach
Switch Switch statement
Glob-style Glob (programming)
List List (computer science)
Dictionary Associative array
Upvar Tcl (programming language)
Coroutines Coroutine
Call stack
Variables Variable (computer science)
Exception handling
Local variables Local variable
Global variables Global variable
Recursion Recursion (computer science)
Stack overflow Stack buffer overflow
Collatz sequence Collatz conjecture
Incr Tcl
XOTcl

Web application development

Apache HTTP Server
PHP
ASP Active Server Pages
JSP JavaServer Pages
Karl Lehenbauer
GD Graphics Library

Interfacing with other languages

Keywords Keyword (computer programming)
Function Subroutine
Logic simulators Logic simulation
Verilog
VHDL
Hardware languages Hardware description language
SWIG
DLL Dynamic-link library

Extension packages

Expect
API
Windows XP
Qt Qt (toolkit)
X11
KDE
Aqua Aqua (user interface)
Pixmaps Pixmap
Itcl
Tcllib
Expat Expat (library)
OpenSSL
User Datagram Protocol
MySQL
ODBC
PostgreSQL
SQLite

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Nodes120

Edges119

Triples19

Avg. degree1.98

Density0.016667

Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Tcl (programming language)

Top relations

Designed by · 1

Tcl (programming language) → John Ousterhout

Developer · 1

Tcl (programming language) → Tcl Core Team

Filename extensions · 1

Tcl (programming language) → .tcl, .tbc

First appeared · 1

Tcl (programming language) → 1988; 38 years ago (1988)

Implementation language · 1

Tcl (programming language) → C, Tcl

License · 1

Tcl (programming language) → BSD-style

Paradigm · 1

Tcl (programming language) → Multi-paradigm: event-driven, functional, imperative, object-oriented

Stable release · 1

Tcl (programming language) → 9.0.4 / 26 June 2026; 58 days ago (26 June 2026)

Typing discipline · 1

Tcl (programming language) → Dynamic typing, everything is a string

Website · 1

Tcl (programming language) → www.tcl-lang.org

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

tcl command commands language variable script code argument used programming tk variables arguments may value system use dynamic control source

Entity relationships Subject–Predicate–Object triples

Subject	Predicate	Object	Confidence	Src
Tcl (programming language)	Designed by	John Ousterhout	1.00	infobox
Tcl (programming language)	Developer	Tcl Core Team	1.00	infobox
Tcl (programming language)	Filename extensions	.tcl, .tbc	1.00	infobox
Tcl (programming language)	First appeared	1988; 38 years ago (1988)	1.00	infobox
Tcl (programming language)	Implementation language	C, Tcl	1.00	infobox
Tcl (programming language)	License	BSD-style	1.00	infobox
Tcl (programming language)	Paradigm	Multi-paradigm: event-driven, functional, imperative, object-oriented	1.00	infobox
Tcl (programming language)	Stable release	9.0.4 / 26 June 2026; 58 days ago (26 June 2026)	1.00	infobox
Tcl (programming language)	Typing discipline	Dynamic typing, everything is a string	1.00	infobox
Tcl (programming language)	Website	www.tcl-lang.org	1.00	infobox
meta-classes	instance of	including advanced features	0.80	text
filters	instance of	including advanced features	0.80	text

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

Connections between topic areas Semantic bridges

Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

Min side: 3