#26954 [Opn->Bgs]: 0.1 - 01 = -2.77555756156E-017
| From: | derick@php.net | Date: | Sun, 18 Jan 2004 15:00:44 +0000 |
| Subject: | #26954 [Opn->Bgs]: 0.1 - 01 = -2.77555756156E-017 | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-53522@lists.php.net to get a copy of this message | ||
ID: 26954
Updated by: derick@php.net
Reported By: choikh at oms dot cc
-Status: Open
+Status: Bogus
Bug Type: *General Issues
Operating System: window, linux
PHP Version: 4.3.4
New Comment:
Floating point values have a limited precision. Hence a value might
not have the same string representation after any processing. That also
includes writing a floating point value in your script and directly
printing it without any mathematical operations.
Thank you for your interest in PHP.
/
Previous Comments:
------------------------------------------------------------------------
[2004-01-18 09:54:49] choikh at oms dot cc
Description:
------------
bug sample
<?
$tot = 0.3;
for($i=0;$i < 3; $i++)
{
echo("==> $tot, ");
$tot -= 0.1;
echo("==> $tot<br>");
}
?>
result
==> 0.3, ==> 0.2
==> 0.2, ==> 0.1
==> 0.1, ==> -2.77555756156E-017
why ?
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=26954&edit=1