tclvars

tclvars , a page in the official documentation, describes the built-in Tcl variables

See Also

Magic names

Tcl syntax

Documentation

official reference

Description

$argc

the number of arguments the script was called with.

$argv

a list of arguments passed to the script. Unlike C, $argv does not include the name of the application itself among the argument list. For that, there is $argv0.

$argv0

the name of the interpreter itself

$auto_execs

Used by auto_execok to record information about whether particular commands exist as executable files.

$auto_index

Used by auto_load to save the index information read from disk.

$auto_noexec

$auto_noload

$auto_oldpath

$auto_path

$dir

$env

$env(TCL_LIBRARY)

$env(TCLLIBPATH)

$errorCode

$errorInfo

$tclDefaultLibrary

on unix

$tcl_interactive

$tcl_libpath

$tcl_library

The name of the directory containing the scripts that compose the Tcl system of the current application. Not to be confused with $env(TCL_LIBRARY). The initial value of this variable is determined by finding a directory that contains an appropriate Tcl startup script. Locations from the following sources are searched, in order: $env(TCL_LIBRARY), some other directories based on an internal algorithm, the location of the application executable file, and the current working directory.

$tcl_patchLevel

$tcl_pkgPath

$tcl_platform

$tcl_precision

$tcl_rcFileName

$tcl_rcRsrcName

$tcl_traceCompile

$tcl_traceExec

$tcl_version

$unknown_pending

$tcl_wordchars and $tcl_nonwordchars

There are also a number of special shell environment variables which can influence Tcl behavior. These include:

CC

COMSPEC

on Windows

HOME

HOMEDRIVE

on Windows

HOMEPATH

on Windows

LANG

LC_ALL

LC_CTYPE

PATH

PATHEXT

on Windows

SHLIB_CFLAGS

TCL_LIBRARY

TCLLIBPATH

TCLTEST_OPTIONS

TZ

on Windows

windir

on Windows