Re: code question

I try to avoid using compound IF clauses in favour of SELECT.

In this example ...

IF cfco = '9';
SELECT;
WHEN cfacct = '1919';
// whatever
WHEN ctacct = '1920';
// whatever
OTHER;
// optional catch-all
ENDSL;
ENDIF;

Regards,
John Mckay


----- Original Message ----- From: "Adam Glauser" <adamglauser@xxxxxxxxxxxx>
Newsgroups: midrange.rpg400-l
To: <rpg400-l@xxxxxxxxxxxx>
Sent: Friday, October 03, 2008 3:15 PM
Subject: Re: code question

Charles Wilt wrote:

From the manual:

"The ANDxx operation has higher precedence than the ORxx operation."

*Note: in every language I've ever used AND has a higher precedence then OR

There's a reason for that. If you look at the rules of formal logic,
you'll find that 'AND' has a lot of the same properties of
multiplication. It is associative, commutative, distributive and
idempotent.

I'd highly recommend some study of formal logic and/or Boolean algebra
to anyone who writes code. A little bit of Boolean algebra can go a
long way in simplifying complex conditions on branching statements.
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