A mathematician has asked your Python instructor to write a program that calculates factorials. Your instructor has assigned this task to you. This program should be saved as Factorials.py. Write a program using either the while or for loops.

In mathematics, the factorial of a natural number n is the product of all positive integers less than and equal to n. This is written as n! and is pronounced "n factorial."

• Example: 5! is 5*4*3*2*1 or 120
• Example: 6! Is 6*5*4*3*2*1 or 720