#44277 [Opn->Bgs]: when round() rounds a number -1<x<0, then it returns -0 (should be 0)

ID: 44277 Updated by: jani@php.net Reported By: felix dot ospald at gmx dot de -Status: Open +Status: Bogus Bug Type: Math related Operating System: Windows XP PHP Version: 5.2.5 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: ------------------------------------------------------------------------ [2008-02-28 00:28:34] felix dot ospald at gmx dot de Description: ------------ This bug was already reported for Linux 3405 in 2000. Is this a bug or feature? Reproduce code: --------------- echo round(-0.1); Expected result: ---------------- "0" Actual result: -------------- "-0" ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=44277&edit=1