#31625 [Opn->Bgs]: <?php var_dump(123343423.56-123343483.54);?> return float(-59.9800000042) ! WHY
| From: | magnus@php.net | Date: | Thu, 20 Jan 2005 17:00:57 +0000 |
| Subject: | #31625 [Opn->Bgs]: <?php var_dump(123343423.56-123343483.54);?> return float(-59.9800000042) ! WHY | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-72526@lists.php.net to get a copy of this message | ||
ID: 31625
Updated by: magnus@php.net
Reported By: zyme at cpcw dot com
-Status: Open
+Status: Bogus
Bug Type: Unknown/Other Function
Operating System: windows 2003 + apache 2
PHP Version: 5.0.2
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:
------------------------------------------------------------------------
[2005-01-20 17:15:22] zyme at cpcw dot com
Description:
------------
<?php var_dump(123343423.56-123343483.54);?>
return float(-59.9800000042) !
WHY ?
Reproduce code:
---------------
<?php var_dump(123343423.56-123343483.54);?>
Expected result:
----------------
float(-59.9800000042)
Actual result:
--------------
float(-59.98)
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=31625&edit=1