set(3Tcl)

NAME
     set - Read and write variables

SYNOPSIS
     set varName ?value?


DESCRIPTION
     Returns the value of variable varName.  If value is specified, then set
     the value of varName to value, creating a new variable if one doesn't
     already exist, and return its value.  If varName contains an open
     parenthesis and ends with a close parenthesis, then it refers to an array
     element:  the characters before the first open parenthesis are the name
     of the array, and the characters between the parentheses are the index
     within the array.  Otherwise varName refers to a scalar variable.  If no
     procedure is active, then varName refers to a global variable.  If a
     procedure is active, then varName refers to a parameter or local variable
     of the procedure unless the global command has been invoked to declare
     varName to be global.


KEYWORDS
     read, write, variable