• Subject: Re: How to process EVAL error
  • From: Vanja Jovic <vanja@xxxxxxxxx>
  • Date: Sat, 16 Oct 1999 17:29:02 -0600



Karl wrote:
> 
> If either is 0 the answer is 0 so why do the calculation.
> 

        That is not exactly the true. Division by zero is not defined, and
that's why EVAL a=x/0 will cause error condition (I think status code is
102). Zero divided by any number (<>0) is zero. Another common mistake
is attempt to calculate SQRT from negative number (for example, when
standard deviation is used to make business decision). Again, *PSSR
helps partially, but we should hope that Hans will keep his word (or
promise, I don't remember) and do something about it. :)))

Vanja Jovic


> ----- Original Message -----
> From: Vanja Jovic <vanja@ecn.ab.ca>
> To: <MIDRANGE-L@midrange.com>
> Sent: Saturday, October 16, 1999 12:34 AM
> Subject: Re: How to process EVAL error
> 
> > It is poor solution, but (for now), you can use *PSSR to check for the
> > EVAL errors.
> >
> > "Karl Lauritzen Jr." wrote:
> > >
> > > Suppose its really Answer = A/B
> > >
> > > I may be a simpleton but I would do
> > >
> > >       IF a <> 0 and B <> 0
> > >       EVAL Answer = A/B
> > >       ENDIF
> >
> > ...and why would you check for a<>0 ?
> >
> > Vanja
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