Prep Problem 9

Write a program that can accept one input, a positive integer. The program should calculate the factorial value for that number. In mathematical terms, the factorial of a number N is the product of positive integers between 1 and N. So for instance:

• . . .
• 4 factorial = (1 * 2 * 3 * 4) = 24
• 5 factorial = (1 * 2 * 3 * 4 * 5) = 120
• 6 factorial = (1 * 2 * 3 * 4 * 5 * 6 ) = 720
• 7 factorial = (1 * 2 * 3 * 4 * 5 * 6 * 7) = 5040
• . . .

Use a while-loop to calculate and print the factorial for the input number. For instance:

Enter factorial to calculate:
5

5 factorial = 120

Name the program prep9.py. Make sure that gradescope gives you the points for passing the test case(s).