# Sqrt()

Today, we will discuss the `sqrt()` function in PHP. This function is used to calculate the square root of a number.

## What is the sqrt() Function?

The `sqrt()` function in PHP is a built-in function that is used to calculate the square root of a number. The square root of a number is defined as the number that, when multiplied by itself, gives the original number. The `sqrt()` function takes a number as its argument and returns the square root of that number.

## How to Use the sqrt() Function

Using the `sqrt()` function in PHP is very simple. Here is an example of how to use the function:

``````<?php
// Calculate the square root of a number using the sqrt() function
\$result = sqrt(16);

// Output the result
echo \$result;
?>``````

In this example, we call the `sqrt()` function to calculate the square root of the number 16. We then store the result in a variable and output it to the screen.

## Conclusion

The `sqrt()` function in PHP is a useful tool for any PHP developer working with mathematical calculations involving square roots. By using this function, you can easily calculate the square root of a number, which can be useful in a variety of applications. We hope that this guide has been helpful in understanding how to use the `sqrt()` function in your PHP code.