return in a for next loop

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Thanks, so that would mean I should use exit before a return. The reason for my question is that, in my current project, I'm exiting a lot of loops, mostly in this form:
test = 0
For x = 0 to 100
for y = 0 to 100
  if p[x, y] = 0 then test = 1: exit
next
if test = 1 then exit
next
if test = 1 then return

Say, when testing all vertices of a mesh. So I wondered if it's possible to just call return, without calling exit. In other versions of basic (don't remember which one), this would give problems with the stack memory.