#43906 [Opn->Bgs]: wrong calculation from function number_format

ID: 43906 Updated by: johannes@php.net Reported By: b dot paulsen at cms-mail dot de -Status: Open +Status: Bogus Bug Type: *Math Functions Operating System: Linux PHP Version: 4.4.8 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: ------------------------------------------------------------------------ [2008-01-22 11:21:03] b dot paulsen at cms-mail dot de Description: ------------ Hello, if you do follow code you get a wrong float back: echo number_format(19.80,20,",","."); 19,80000000000000071054 thanks Reproduce code: --------------- echo number_format(19.80,20,",","."); Expected result: ---------------- 19,80000000000000071054 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=43906&edit=1