#Factorial of Number
You are going to write an application to determine the factorial of a single number.
A factorial of an integer is the product of that integer and all the integers below it. For example, the factorial of 4 is (4 x 3 x 2 x 1 = 24).
The user will be required to enter an integer.
You will then calculate the factorial of that integer and print the result to the screen.