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1990-05-03
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500b
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11 lines
set varname [value]
If value isn't specified, then return the current value
of varname. If value is specified, then set the value
of varname to value, creating a new variable if one
doesn't already exist. 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.