#45321 [Opn->Bgs]: Subtract two float no

ID: 45321 Updated by: johannes@php.net Reported By: saurabh-goyal at hotmail dot com -Status: Open +Status: Bogus Bug Type: Output Control Operating System: Windows NT PHP Version: 5.2.6 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: ------------------------------------------------------------------------ [2008-06-20 10:19:56] saurabh-goyal at hotmail dot com Description: ------------ <?php echo 4998937.3273-4998918.4921; ?> Output :-18.8351999996 But Exactly Output is 18.8352 Reproduce code: --------------- <?php echo 4998937.3273-4998918.4921; ?> Expected result: ---------------- Output :-18.8351999996 Actual result: -------------- But Exactly Output is 18.8352 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=45321&edit=1