#50975 [Opn->Bgs]: Floating point match Failure

From: Date: Tue, 09 Feb 2010 16:44:09 +0000
Subject: #50975 [Opn->Bgs]: Floating point match Failure
References: 1  Groups: php.bugs 
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 ID:               50975
 Updated by:       rasmus@php.net
 Reported By:      dmgx dot michael at gmail dot com
-Status:           Open
+Status:           Bogus
 Bug Type:         *Math Functions
 Operating System: Windows & Linux
 PHP Version:      5.3.1
 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.

If you would like to know more about "floats" and what IEEE
754 is, read this:
http://docs.sun.com/source/806-3568/ncg_goldberg.html
 
Thank you for your interest in PHP.

.


Previous Comments:
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[2010-02-09 16:43:00] dmgx dot michael at gmail dot com

Description:
------------
What is 34.2 - 33.98? I don't think the answer needs 15 digits.

Reproduce code:
---------------
<?php echo 34.2 - 33.98 ?>

Expected result:
----------------
0.22

Actual result:
--------------
0.22000000000001


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