Re: mathematical discrepancies

Well, yes, it is expected behavior. I think you're confusing the abs() with the round() function (see Evert's answer earlier). abs(-1.05) = 1.05 round(-1.05) = -1 abs(1.35) = 1.35 round(1.35) = 1 hth, Yves ----- Original Message ----- From: "Andrew Martin" <sublimino@gmail.com> To: <php-db@lists.php.net> Sent: Thursday, August 14, 2008 7:55 AM Subject: [PHP-DB] mathematical discrepancies

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 -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php