PHP sqrt() function

The sqrt() is mathematical function, used to calculate the square root of any number.

Syntax:

Parameter	Description	Required /Optional
number	Specifies a number	Required

$PHP math Sqrt function$

Example1

<?php
$num=625;
echo "Your number is : $num".'<br>';
echo "By using sqrt function Your number is : ".sqrt ($num);
?>

Output:

Your number is : 625
By Using sqrt function Your number is : 25

Example2

<?php
$num=(-9);
echo "Your number is : $num".'<br>';
echo "By using sqrt function Your number is : ".sqrt ($num);
?>

Output:

Your number is : -9
By using sqrt function Your number is : NAN

Note: The square root of argument or the special value NAN for negative numbers.

Example 3

<?php
$num=(0.09);
echo "Your number is : $num".'<br>';
echo "By using sqrt function Your number is : ".sqrt ($num);
?>

Output:

Your number is : 0.09
By using sqrt function Your number is : 0.3

Example 4

<?php
$a=3;  // One side
$b=4;  // One side
$h=sqrt(pow($a,2)+pow($b,2));
echo "Your number is : $a and $b".'<br>';
echo "By using sqrt function (pow($a,2)+pow($b,2)) Your number is : ".$h;
?>

Output:

Your number is : 3 and 4
By using sqrt function (pow(3,2)+pow(4,2)) Your number is : 5

Next TopicPHP Math

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PHP sqrt() function

Syntax:

Example1

Example2

Note: The square root of argument or the special value NAN for negative numbers.

Example 3

Example 4

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