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Bug #45442 Math problem
Submitted: 2008-07-07 07:44 UTC Modified: 2008-07-07 08:25 UTC
From: s dot kozlov at promoting dot ru Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.2.6 OS: Fedora 6
Private report: No CVE-ID: None
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 [2008-07-07 07:44 UTC] s dot kozlov at promoting dot ru 
Description:
------------
Math bug

Reproduce code:
---------------
echo floor(1710 / (1710 / 100));

Expected result:
----------------
100

Actual result:
--------------
99

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 [2008-07-07 08:25 UTC] pajoye@php.net 
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
 
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