Bug #62170 [Opn]: Inaccurate division

From: Date: Sun, 27 May 2012 08:46:57 +0000
Subject: Bug #62170 [Opn]: Inaccurate division
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-170859@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=62170&edit=1

 ID:                 62170
 Updated by:         laruence@php.net
 Reported by:        cidahf at live dot co dot uk
 Summary:            Inaccurate division
 Status:             Open
 Type:               Bug
 Package:            Math related
 Operating System:   Ubuntu 12.04
 PHP Version:        5.4.3-4~precise+1
 Block user comment: N
 Private report:     N

 New Comment:

float is inaccurate, http://cn.php.net/manual/en/language.types.float.php


Previous Comments:
------------------------------------------------------------------------
[2012-05-27 05:14:47] cidahf at live dot co dot uk

Changed the version to the exact value returned from PHP_VERSION.

------------------------------------------------------------------------
[2012-05-27 05:01:08] cidahf at live dot co dot uk

Description:
------------
When I divide 25.4 by 10000 I get an awkward 
0.002539999999999999723276911112179732299409806728363037109375 instead of the 
desired 0.00254. I tried the same with Ruby 1.8.7 and it returned the correct 
result.

This issue is problematic for unit conversion.

I also got this in 5.3 but I upgraded before making a report.

Test script:
---------------
echo 25.4 / 10000;

Expected result:
----------------
0.00254

Actual result:
--------------
0.002539999999999999723276911112179732299409806728363037109375


------------------------------------------------------------------------



-- 
Edit this bug report at https://bugs.php.net/bug.php?id=62170&edit=1

Thread (5 messages)

« previous php.bugs (#170859) next »