Tcl Built-In Commands
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 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
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.
read, write, variable
[ tcl8.0a1 | tk8.0a1 | X-ref ]
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