note 120654 deleted from language.operators.arithmetic by salathe
| From: | salathe@php.net | Date: | Mon, 21 Sep 2020 14:58:45 +0000 |
| Subject: | note 120654 deleted from language.operators.arithmetic by salathe | ||
| References: | 1 | Groups: | php.notes |
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Note Submitter: pr dot dot dot dot k at g dot dot dot com
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The modulus operator is very poorly suited for such a simple operation as determining if an int is
even or odd. On most common systems, modulus performs a division, which is a very slow operation.
A much better way to find if a number is even or odd is to use the bitwise & operator.
e.g.
$is_odd = $x & 1; //using and
$is_odd = $x % 2; //using modulus