# Exp()

Today, we will discuss the `exp()` function in PHP. This function is used to calculate the exponential value of a number.

## What is the exp() Function?

The `exp()` function in PHP is a built-in function that is used to calculate the exponential value of a number. The exponential value of a number is calculated as e raised to the power of the number provided as input. The function takes a number as input and returns the exponential value of the number.

## How to Use the exp() Function

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

``````<?php
\$number = 2;

// Calculate the exponential value of the number using the exp() function
\$exponential_value = exp(\$number);

// Output the exponential value of the number
echo \$exponential_value;
?>``````

In this example, we set the number as a variable. We then call the `exp()` function with the number as a parameter to calculate the exponential value of the number. Finally, we output the exponential value of the number to the screen.

## Conclusion

The `exp()` function in PHP is a useful tool for any PHP developer working with mathematics. By using this function, you can calculate the exponential value 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 `exp()` function in your PHP code.