Edit report at http://bugs.php.net/bug.php?id=54224&edit=1
ID: 54224 Updated by: scott...@php.net Reported by: philip dot almeida at freedomson dot com Summary: Sum comutative operation fails with minus on front -Status: Open +Status: Bogus Type: Bug Package: Math related Operating System: Linux PHP Version: Irrelevant Block user comment: N Private report: N 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://www.floating-point-gui.de/ Thank you for your interest in PHP. Previous Comments: ------------------------------------------------------------------------ [2011-03-11 12:31:04] philip dot almeida at freedomson dot com Description: ------------ Making a comutative sum operation the result does not return the expected value. Test script: --------------- echo -6.3536+5+1.3536; = -2.22044604925E-16 echo -6.3537+5+1.3537 = 0 Expected result: ---------------- Always 0 Actual result: -------------- -2.22044604925E-16 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=54224&edit=1
