Re: FOR loop limit

David

Yes, of course - and that is only what you should expect. So use the way that works best for you and is most understandable to other developers.

If you are writing in C, I bet that if numberloops = 32767, and that i is a signed int, that you will get an overflow error in the 2nd case - I can't say for sure - I leave that as an exercise for the reader.

Now maybe C compilers catch the situation so that it does not become a runtime error.

I do not say that this is the reason for zero-based arrays - I believe that has more to do with machine architecture - offsets being the operative principle, not positions. But I'm probably far too deep into things I don't know for sure.

Back to sleep I go
Vern

David FOXWELL wrote:

Hi Scott,

After
for i = 0 to numberloops-1;
Index = i+1;
endfor;

i = numberloops,

But after
for i = 1 to numberloops;
Index = i;
endfor;

I= numberloops + 1.


-----Message d'origine-----
De : rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] De la part de Scott Klement
Envoyé : vendredi 30 janvier 2009 19:35
À : RPG programming on the IBM i / System i
Objet : Re: FOR loop limit

Hello David,

Why don't we start at 0 like in other languages?

For (int i=0 ; numberloops-1 ; i++)
Index= i + 1;

I don't see what you're getting at. You can start a loop with 0 in RPG the same as any other language:

for i = 0 to numberloops-1;
Index = i+1;
endfor;

I wonder if you're confusing loops with arrays? But even if you were talking about an array, you've added 1 to your index in your C example
-- so I really don't know what you're trying to say.
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