Re: Is there an OP-Code to determine if a Numeric Field is Negative?

[boldt@xxxxxxxxxx]

Brian wrote:
>Greetings All;
>
>Is there an Op code that I can use to determine if a numeric field is
Negative?
> Just looking for a different way than doing this...
>
>IF  Number_Field    <   0
>Do Something...
>EndIf

Is this a trivia question or something?  Why the heck
would you want to find an alternative to using IF in
this case?

Hmmm, OK, here are a couple of unusual ways:

1) EVAL the number to an unsigned field.  If you get
   an exception, you have a negative value.
2) EVAL to an integer field and check the high-order
   bit using TESTB.
3) IF %SUBST(%TRIML(%EDITC(NUM:'Q')):1:1) = '-'

:-)

Cheers!  Hans

Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com


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