RE: Operation Precedence questions

["Tracy Ball" <TBall@xxxxxxxxxxxxxxxx>]

The compiler isn't a math textbook.   If it were (A and B) or A and B or (C and 
D) then the parenthesis would come into play.  If it is just straight *and 
statements, as soon as one is false there would be no need to check what is in 
parenthesis.  Parenthesis on the other hand, greatly enhance the readability of 
a program and enhance a programmer's understanding of what is happening. 
However, that doesn't mean the compiler needs them.

Tracy L. Ball
The Jackson Group
Sr. Programmer/Analyst 
(317) 781-4600 ext. 3107



-----Original Message-----
From: Gord Royle [mailto:GRoyle@xxxxxxxx]
Sent: Thursday, March 20, 2003 3:09 PM
To: 'RPG programming on the AS400 / iSeries'
Subject: RE: Operation Precedence questions


Take it from someone who went Ga-Ga in School over Boolean Math -
Parentheses change everything. Try A and B or C and D versus (A and B) or (C
and D). Stuff in Parenthesis is always evaluated first. I tend to use lots
of them 'cause I'm still confused by AND/OR precidence and get even more
confused when you throw in a NOT. Consider A or B and C or NOT D. <Hair
starts to come out>.

Gord

-----Original Message-----
From: Dan [mailto:dbcerpg@xxxxxxxxx]
Sent: Thursday, March 20, 2003 2:53 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Operation Precedence questions


--- Booth Martin <Booth@xxxxxxxxxxxx> wrote:
> Isn't the rule really: "Do from the inside out, starting on the left." ? 

If it is, I didn't see it in that chapter!  Doesn't that rule apply to
expressions inside
parentheses?

- Dan

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