Global Variables 1

[JRyanCon]

If you set a variable and want to use that variable in a Proc you have to use the "global" command on that variable. Then it becomes usable. Like:

=======
set foo "10"

proc bar {} {
global foo
puts "$foo"
}

=======

This would print 10

I understand this. However, what if I want to use a variable outside a proc that I started and modified in that proc? for instance:


========
set foo "10"

proc bar {} {
set var "5"
}

bar
puts $var
===========

how would I go about this? What i actually have is a procedure thats will run X times and when it runs I want to incr a value then call that value outside the proc.

Anyone care to clear this up for me?

 

[marsd]

Once again use global.

proc makeglobalresult {n} {
global res
          set res [expr int(1 + rand() * $n)]
}