How to use php sqrt function?

php The sqrt function is used to return the square root of a number. Its syntax is sqrt(x). The parameter x is required and refers to a number.

#How to use php sqrt function?

Definition and usage

sqrt() function returns the square root of a number.

Syntax

sqrt(x)

Parameters

x Required. a number.

Description

Returns the square root of x.

Tips and Notes

Note: If the parameter x is a negative number, the sqrt() function returns -1.#IND.

Example

In this example we will return the square roots of distinct numbers:

<?php
echo(sqrt(0));
echo(sqrt(1));
echo(sqrt(9));
echo(sqrt(0.64));
echo(sqrt(-9));
?>

Output:

0
1
3
0.8
-1.#IND

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