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[edit] Last updated: Fri, 24 Jun 2011

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sqrt

(PHP 4, PHP 5)

sqrtریشه مربعی

Description

float sqrt ( float $arg )

بازگرداندن ریشه مربع arg.

Parameters

arg

آرگومان برای پردازش

Return Values

ریشه مربع arg با مقدار ویژه NAN برای عدد منفی.

Examples

Example #1 sqrt() example

<?php
// Precision depends on your precision directive
echo sqrt(9); // 3
echo sqrt(10); // 3.16227766 ...
?>

See Also

  • pow() - Exponential expression



add a note add a note User Contributed Notes sqrt - [1 notes]
up
5
jouhni at web dot de
8 years ago
To get any root of a number your can use the pow() function:

pow(8, 1/3)

which gives you the third root of eight.

Jouhni

 
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