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set(n)			     Tcl Built-In Commands			set(n)


       set - Read and write variables

       set varName ?value?

       Returns the value of variable varName.  If value	is specified, then set
       the value of varName to value, creating a new variable if one does  not
       already	exist,	and  return  its  value.   If varName contains an open
       parenthesis and ends with a close parenthesis, then it refers to	an ar-
       ray  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  varName  includes  namespace	 qualifiers  (in  the array name if it
       refers to an array element), or if varName is unqualified (does not in-
       clude  the  names of any	containing namespaces) but no procedure	is ac-
       tive, varName refers to a namespace variable resolved according to  the
       rules described under NAME RESOLUTION in	the namespace manual page.

       If  a  procedure	 is  active  and  varName is unqualified, then varName
       refers to a parameter or	local variable of the procedure,  unless  var-
       Name  was  declared  to	resolve	differently through one	of the global,
       variable	or upvar commands.

       Store a random number in	the variable r:
	      set r [expr {rand()}]

       Store a short message in	an array element:
	      set anAry(msg) "Hello, World!"

       Store a short message in	an array element specified by a	variable:
	      set elemName "msg"
	      set anAry($elemName) "Hello, World!"

       Copy a value into the variable out from a variable whose	name is	stored
       in  the vbl (note that it is often easier to use	arrays in practice in-
       stead of	doing double-dereferencing):
	      set in0 "small random"
	      set in1 "large random"
	      set vbl in[expr {rand() >= 0.5}]
	      set out [set $vbl]

       expr(n),	global(n),  namespace(n),  proc(n),  trace(n),	unset(n),  up-
       var(n), variable(n)

       read, write, variable

Tcl									set(n)


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