The exponential $e^x$ can be calculated using the following formula:

$e^x=1+\frac{x}{1!}+\frac{x^2}{2!}+\frac{x^3}{3!}+\frac{x^4}{4!}+\frac{x^5}{5!}$

The factorial of non$-$negative integer $n$ is written $n!$ And$-$is defined as follows:

$)=(0$

Write a java program that contains two methods factorial and exp according to the formulas that we mentioned above. The main task for this program is to ask the user to enter a number and calculate its exponential then display the result.

$>$ Note that exp method will call factorial method.