#48455 [Bgs]: sprintf error when multiplying float and displaying digit

ID: 48455 User updated by: aldo at totalaldo dot com Reported By: aldo at totalaldo dot com Status: Bogus Bug Type: Strings related Operating System: FreeBSD 7.2-RELEASE PHP Version: 5.2.9 New Comment: Thank you for your prompt reply. I was aware of the limitations of Floating point representations.. Hopefully, anyone using similar code will now use another technique. php -r 'echo sprintf("%6s", 34.98*100);' outputs the expected result of 3498. Previous Comments: ------------------------------------------------------------------------ [2009-06-02 17:52:23] rasmus@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 Thank you for your interest in PHP. ------------------------------------------------------------------------ [2009-06-02 17:51:03] aldo at totalaldo dot com Description: ------------ php -r 'echo sprintf("%6d", 34.98*100);' output: 3497 Reproduce code: --------------- php -r 'echo sprintf("%6d", 34.98*100);' Expected result: ---------------- 3498 Actual result: -------------- 3497 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=48455&edit=1