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Bug #70954 Wrong Calculation
Submitted: 2015-11-22 15:08 UTC Modified: 2015-11-22 20:43 UTC
From: sukram230799 at outlook dot com Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.6.15 OS: Window 10
Private report: No CVE-ID: None
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 [2015-11-22 15:08 UTC] sukram230799 at outlook dot com 
Description:
------------
---
From manual page: http://www.php.net/index
---

PHP is calculating wrong or inacurate.

Test script:
---------------
echo(272.19-273.15);

Expected result:
----------------
-0.96

Actual result:
--------------
-0.95999999999998

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 [2015-11-22 20:43 UTC] requinix@php.net
-Status: Open +Status: Not a bug -Type: Documentation Problem +Type: Bug
 [2015-11-22 20:43 UTC] requinix@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://www.floating-point-gui.de/

Thank you for your interest in PHP.
 
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