RE: Operation Precedence questions

["Scott Johnson" <sjohnson@xxxxxxxxxxxxx>]

What you are missing is that the computer IS doing the (X < 10) first.
As soon as it gets done evaluating that part of the formula it goes back
to the default left to right processing. If X = 5, the formula would
become A AND B AND 'true'

--- Scott


> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of Dan
> Sent: Thursday, March 20, 2003 2:35 PM
> To: RPG programming on the AS400 / iSeries
> Subject: Re: Operation Precedence questions
>
>
> --- Douglas Handy <dhandy1@xxxxxxxxxxxxx> wrote:
> > Dan,
> >
> > >What if your example were thus:
> > >    A AND B AND X < 10
> >
> > That becomes the equivalent of
> >
> >   A and B and ( X < 10 )
> >
> > Thus we are now reduced to only have AND clauses, which are
> short-circuit
> > evaluated from left to right.  So unless both A and B are
> true, it never has to
> > evaluate ( X < 10 ).
> >
> > See?
> >
> > Doug
>
> Unfortunately, no, I don't.  As I see it, the parentheses
> surrounding X < 10 *guarantees* that it
> will be evaluated before the ANDs are tested.  Again,
> pointing to the Precedence of Operations:
>
<Snip>