tcl7.6 User Commands - set






NAME

     set - Read and write variables


SYNOPSIS

     set varName ?value?





DESCRIPTION

     Returns the value of variable varName.  If value  is  speci-
     fied, 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  pro-
     cedure unless the global command has been invoked to declare
     varName to be global.



KEYWORDS

     read, write, variable