Re: Multiple Conditions on a DOW loop

Don't worry. I'll leave that argument alone for now. I'm more interested
in why my loop is working as I expect. I'm going to try Loyd's suggestion
in the morning.


Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777



Alan Campin <alan0307d@xxxxxxxxx>
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
06/12/2009 04:42 PM
Please respond to
RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


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Subject
Re: Multiple Conditions on a DOW loop






I personally think this kind of thing is much simpler if you code like the
following.

DoU 0 = 1;

If MyVariable = ' ' or MyVariable = 'A'; // Or what ever.
Leave;
EndIf;

EndDo;

That way I have positive control on when I exit.

Oh, god. Know the battles start.

On Fri, Jun 12, 2009 at 2:24 PM, Alan Shore <AlanShore@xxxxxxxx> wrote:

Hi Bryce
yes - you can put multiple conditions on a do loop
a dow checks the condition on top
a dou checks the condition at the end

so in your case
dow myVariable <> '' and myVariable <> 'A';
line 1
line 2
line 3
line 4
line 5
if certain condition;
myVariable = 'A';
endif;
line 7
line 8
line 9
line 10
enddo

at the beginning, myVariable <> 'A'
after line 5
myVariable is set to 'A'
line 7 through line 10 are also processed
BUT it will NOT go through the DO loop again



Alan Shore
Programmer/Analyst, Distribution
E:AShore@xxxxxxxxxxx <E%3AAShore@xxxxxxxxxxx>
P:(631) 200-5019
C:(631) 880-8640
"If you're going through Hell, keep going" - Winston Churchill



rpg400-l-bounces@xxxxxxxxxxxx wrote on 06/12/2009 04:13:18 PM:

Ok Group. I have run into an interesting problem...

I have this loop structure...

dow myVariable <> '' and myVariable <> 'A';
// I do some stuff
// At some point myVariable could be set to '' or A or another value
// at which point we want to run the loop again.

enddo;

But when myVariable = 'A' the loop runs anyway.

Can we not put multiple conditions on a DOW loop? Is my brain not

reading

my logic correctly today?


Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777
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