Factorial of the number N is the result of the multiplication of all positive integers less than or equal to N. For example, the factorial of 3 is the product of 3, 2, 1, i.e. 3! = 3 x 2 x 1 = 6. Now, your task is to try and write a program that calculates the factorial of the input number using while loop.
The input format:
The number N in range from 1 to 100.
The output format:
The factorial N!.
