note 109731 deleted from function.round by googleguy
| From: | googleguy@php.net | Date: | Sun, 09 Dec 2012 08:13:21 +0000 |
| Subject: | note 109731 deleted from function.round by googleguy | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-192405@lists.php.net to get a copy of this message | ||
Note Submitter: kogut at kogumelo dot com dot br
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I've got this strange precision problem:
<?php
$decimals = 1;
$n=5.95;
echo "<br>n=",$n," ==> ",round($n, $decimals); // 5.95 ==> 6 !
$n = ( 11.9 ) / 2;
echo "<br>n=",$n," ==> ",round($n, $decimals); // 5.95 ==> 6 !
$n = ( 2.7 + 9.2 ) / 2;
echo "<br>n=",$n," ==> ",round($n, $decimals); // 5.95 ==> 5.9 ??
?>
To adjust it, i've done:
<?php
$n = ( 2.7 + 9.2 ) / 2;
$n += pow (10, -( $decimals + 2)) * 1;
echo "<br>n=",$n," ==> ",round($n, $decimals); // 5.951 ==> 6 !
?>