|  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #63303 adding 2 decimals number, returned 13 decimal point ?
Submitted: 2012-10-18 09:37 UTC Modified: 2012-10-18 14:17 UTC
From: mikeyap2005 at gmail dot com Assigned:
Status: Not a bug Package: Math related
PHP Version: 5.3.17 OS: windows 7
Private report: No CVE-ID: None
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If this is not your bug, you can add a comment by following this link.
If this is your bug, but you forgot your password, you can retrieve your password here.
Bug Type:
From: mikeyap2005 at gmail dot com
New email:
PHP Version: OS:


 [2012-10-18 09:37 UTC] mikeyap2005 at gmail dot com
echo (47659.45-47658.35);
// will return 1.0999999999985, which 13 decimals point
// should return "1.10" right ? why "1.0999999999985" ?

Expected result:

Actual result:


Add a Patch

Pull Requests

Add a Pull Request


AllCommentsChangesGit/SVN commitsRelated reports
 [2012-10-18 13:17 UTC]
-Status: Open +Status: Not a bug
 [2012-10-18 13:17 UTC]
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:

Thank you for your interest in PHP.

 [2012-10-18 14:17 UTC] mikeyap2005 at gmail dot com
thanks for your quick response.
PHP Copyright © 2001-2024 The PHP Group
All rights reserved.
Last updated: Thu Apr 18 12:01:28 2024 UTC