RE: IF Coding question

["Bob Cozzi" <cozzi@xxxxxxxxx>]

It equates to this in RPG IV:

   If       NOT TOT1a = TOT2a  and TOT1b = TOT2bc
   EXCEPT   HEADR
   EXCEPT   TOTAL
   ENDIF

It is an old "trick" in RPGIII that allows you to do a set of opcodes when
something is NOT true. In other words, it is too hard to code the opposite
condition, so they coded it in "positive logic" and use the ELSE to reverse
the "polarity" of the conditional statement.
-Bob Cozzi


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of simafrog
Sent: Tuesday, March 30, 2004 8:19 AM
To: RPG programming on the AS400 / iSeries
Subject: IF Coding question

I am trying to understand the point/reason for this code:
      TOT1a   IFEQ TOT2a                   
      TOT1b   ANDEQTOT2bC                   
              ELSE                         
              EXCPTHEADR                   
              EXCPTTOTAL                     
              ENDIF          
Why do you need the "IF" "AND" part? What purpose does this serve?

Thank you,
Rob400              
                                                    
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