while semantics
Grant Edwards
grante at visi.com
Thu Mar 13 19:26:42 EST 2003
In article <b4r6eh$oj4$2 at news.asu.edu>, David Bear wrote:
> I think I'm confusing myself regarding semantics for a while loop.
>
> while (conditionX):
> do something
> while (conditionY):
> do something else
> while (conditionZ):
> do something
> here conditionX becomes False
> print something
> print something else
>
> Will the outer while loop cause all nested whiles to end as soon as
> conditionX is false?
No. conditionX will only be checked once per "outer loop". If
you're in one of the inner loops, you stay there until that
loop's condition is false.
> or will 'print something' be reached, then 'print
> something else' and so on untill it reaches the outer scope?
Neither. You'll stay inside in Z loop until conditionZ
becomes false. Then you'll stay in the Y loop until conditionY
becomes false. After both the Z and Y loops have terminated,
conditionX will be checked again.
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