|  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #30614 Adding floating numbers fails
Submitted: 2004-10-29 19:21 UTC Modified: 2004-10-29 20:17 UTC
From: mauricio at elmaster dot com Assigned:
Status: Not a bug Package: Reproducible crash
PHP Version: 5.0.1 OS: Linux
Private report: No CVE-ID: None
View Add Comment Developer Edit
Welcome! If you don't have a Git account, you can't do anything here.
You can add a comment by following this link or if you reported this bug, you can edit this bug over here.
Block user comment
Status: Assign to:
Bug Type:
From: mauricio at elmaster dot com
New email:
PHP Version: OS:


 [2004-10-29 19:21 UTC] mauricio at elmaster dot com
This simple operation fails. We have tried it on PHP 4.3.4 standard install on fedora Core 2, and PHP 5.0.1.

Instead of 0 we get 1-8.8817841970013E-16. If we change a bit the number the code doesn't fails, very weird.

Reproduce code:
  die(9.95 + 4.97 - 9.95 - 4.97);

Expected result:

Actual result:


Add a Patch

Pull Requests

Add a Pull Request


AllCommentsChangesGit/SVN commitsRelated reports
 [2004-10-29 20:17 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.
Thank you for your interest in PHP.

PHP Copyright © 2001-2020 The PHP Group
All rights reserved.
Last updated: Mon Apr 06 12:01:25 2020 UTC