PHP method to determine whether two floating point numbers are equal_PHP tutorial

How PHP determines whether two floating point numbers are equal

This article describes the example of how PHP determines whether two floating point numbers are equal. Share it with everyone for your reference. The specific analysis is as follows:

Since it is not completely correct to directly use == to determine whether floating point numbers are equal, a method is given below. First set a precision. If they are equal within the precision range, they are considered equal, otherwise they are considered invalid

<?php
$delta = 0.00001;
$a = 1.00000001;
$b = 1.00000000;
if (abs($a - $b) < $delta) { /* $a and $b are equal */ }
?>

I hope this article will be helpful to everyone’s PHP programming design.

http://www.bkjia.com/PHPjc/969341.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/969341.htmlTechArticleHow to determine whether two floating point numbers are equal in PHP. This article explains how to determine whether two floating point numbers are equal in PHP. . Share it with everyone for your reference. The specific analysis is as follows: Due to floating point...