note 111712 deleted from function.round by aharvey
| From: | aharvey@php.net | Date: | Wed, 20 Mar 2013 18:50:39 +0000 |
| Subject: | note 111712 deleted from function.round by aharvey | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-194142@lists.php.net to get a copy of this message | ||
Note Submitter: gu dot zhichao at yahoo dot com dot cn
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NOTE: when you set precision to bigger than 16, the round result will be strange!
//PHP 5.2.10 (cli) (built: Jun 22 2009 10:59:16)
//Linux S139 2.6.9-67.0.1.ELsmp #1 SMP Wed Dec 19 16:01:12 EST 2007 i686 i686 i386 GNU/Linux
//CentOS release 4.6 (Final)
ini_set("precision", "50");
echo round(1.0/3.0,2), "\n"; //0.33000000000000001554312234475219156593084335327148
ini_set("precision", "17");
echo round(1.0/3.0,2), "\n";// 0.33000000000000002
ini_set("precision", "17");
echo round(1.0/3.0,1), "\n"; // 0.29999999999999999
ini_set("precision", "16");
echo round(1.0/3.0,2), "\n"; // 0.33
ini_set("precision", "12");
echo round(1.0/3.0,2), "\n"; // 0.33