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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"; //output: 0.03
Check http://php.net/manual/en/language.types.float.php
Quote:
Warning
Floating point precision
It is typical that simple decimal fractions like 0.1 or 0.7 cannot be
converted into their internal binary counterparts without a small loss
of precision. This can lead to confusing results: for examp
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"; //output: 0.03
$a = 1754.00 ;
$b = 1754.09 ;
$diff = abs($b) - abs($a);
echo "$diff"; //output :0.08999
$a = 1754.01 ;
$
