RE: notted boolean expressions (was: output specs and indicators)

Steve,

I am pretty sure that the two statements below are identical.  According to
operator precedence AND is performed before the OR.  Therefore, your
parentheses that force the AND to be performed before the OR results in the
same expression as if the parentheses are left out.  After having said that,
I would definitely code the expression below with the parentheses to make
sure and to make the code more readable.  Or refactor it such as you did.

Scott Mildenberger

> -----Original Message-----
> From: Steve Landess [mailto:steve_landess@hotmail.com]
> Sent: Monday, December 02, 2002 5:34 PM
> To: rpg400-l@midrange.com
> Subject: Re: notted boolean expressions (was: output specs and
> indicators)
>
> You CANNOT express it like this:
> IF  NOT *IN01 AND *IN02  OR  NOT *IN01 AND *IN03  OR  NOT
> *IN01 AND *IN04...
>
> Upon conversion, this would have have to be expressed as
> IF (NOT *IN01 AND *IN02) OR  (NOT *IN01 AND *IN03) OR  (NOT
> *IN01 AND *IN04)
> ....