The sqrt Function

The sqrt function finds the square root of a number.

Syntax

phpsqrt(number);

Example

Let's calculate the square root of 16:

php<?php
  echo sqrt(16);
?>

Code execution result:

php4

Example

Let's calculate the square root of 5:

php<?php
  echo sqrt(5);
?>

Code execution result:

php2.2360679774998

See Also