mathematical discrepancies

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Hello,

Can anybody shed any light on this behaviour please?

PHP Version 5.2.5 on XP


$a = 1754.00 ;
$b = 1754.03 ;
$diff = abs($b) - abs($a);

echo "$diff<br/>";     //output: 0.03

$a = 1754.00 ;
$b = 1754.09 ;
$diff = abs($b) - abs($a);

echo "$diff<br/>";     //output :0.0899999999999

$a = 1754.01 ;
$b = 1754.02 ;
$diff = abs($b) - abs($a);

echo $diff;     //output: 0.00999999999999


Is this expected behaviour? Can anybody reproduce this?

Many thanks,


Andy

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