sqrt()
` function. Here's an example :<?php
$number = 16;
$sqrt = sqrt($number);
echo "The square root of $number is $sqrt\n";
?>
The square root of 16 is 4
$number
` is defined with the value `16
`. The `sqrt()
` function is called with `$number
` as an argument to find the square root of `16
`, and the result is stored in the variable `$sqrt
`.$sqrt
` is then output using `echo
`.sqrt()
` function returns a float value, even if the input is a perfect square. If you want to check if a number is a perfect square, you can use the `is_int(sqrt($number))
` function, which will return `true
` if the square root of the number is an integer.