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Warning: A non-numeric value encountered in /web5/aldweb/www/aldweb_com/www/thread.php on line 257

active  Topic # 1397  WHILE Y>X AND S

30/04/2006 @ 06:58
by bh77a

Anonymous
Hi,

This is probably a foolish question on my behalf, but trying to enter into a WHILE/WEND loop with the WHILE set up as:

WHILE Y>X AND S<=5

results in a syntax error at compilation. Is this not possible or should it be nested? See below:

WHILE Y>X
WHILE S<=5

Thanks for any clarification that one could provide.

bh77a
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Warning: A non-numeric value encountered in /web5/aldweb/www/aldweb_com/www/thread.php on line 497
Answer n° 1
--------
30/04/2006 @ 18:09
by aldweb

Anonymous

visitor
 Hi bh77a,

Here is how to proceed:

A=(Y>X) AND (S<=5)
WHILE A=TRUE
...
A=(Y>X) AND (S<=5)
WEND


This is because the math parser is not fully implemented (yet?) except for real variables affectations, i.e. A=something.
In all other statements, you need to have only one active boolean test (i.e. [=,<=,>=,<>,<,>]. This should be written somewhere in the faq, apart from being clearly stated in the WHILE statement's syntax.

Cheers,
aldweb


@+
aldweb
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Warning: A non-numeric value encountered in /web5/aldweb/www/aldweb_com/www/thread.php on line 497
Answer n° 2
--------
30/04/2006 @ 23:15
by bh77a

Anonymous

visitor
 Hi Aldweb,

Your explanation makes good sense.

I also solved it by:

WHILE S<=5
IF Y>X
...
ENDIF
WEND

Regards,
bh77a
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Warning: A non-numeric value encountered in /web5/aldweb/www/aldweb_com/www/thread.php on line 497
Answer n° 3
--------
01/05/2006 @ 20:37
by aldweb

Anonymous

visitor
 Hi,

This will also work of course. You just have to be careful that the S value can be set to a new condition value not only in the IF Y>X / ENDIF loop, otherwise you shall never exit the WHILE loop!

Cheers

@+
aldweb
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Warning: A non-numeric value encountered in /web5/aldweb/www/aldweb_com/www/thread.php on line 497
Answer n° 4
--------
02/05/2006 @ 04:23
by bh77a

Anonymous

visitor
 Hi,

Very true. Fortunately this doesn't occur in my test loop.

Regards,
bh77a
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