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Date: Thu, 05 Aug 2004 20:02:04 -0500
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Subject: Modulo Function returns incorrect results
From: dr_mac@mail.utexas.edu (Matthew Boehm)

Found some weird behavior in the built in mod function (%):

$a = 4;   
$b = 3;   
print ( $a % $b );  (returns 1 as it should)

Now swap $a and $b:

$a = 3;   
$b = 4;   
print ( $a % $b );

This returns 3. 3?! 3/4 is 0.75. Shouldn't this return 0?

Try this one:

$a = 20;  
$b = 10;  
print ( $a % $b );

Shouldn't that return 2? It returns 0;

$a = 11;  
$b = 21;  
print ( $a % $b );

Returns 11.  What is going on?  Was my C.S. Professor wrong in telling us
that the % function returns the left side of the decimal in a division?

This is PHP 4.3.4

Any help would be appreciated.

Thanks,
Matthew
-- 
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Matthew Boehm
dr_mac@mail.utexas.edu
The University of Texas at Austin, Department of Geography

"Why did the prison use Windows2K as a guard? Because it always locks up!"
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