NEED HELP WITH THIS PYTHON PROGRAM PLEASE!

Question 4 10 pts Write a program to calculate the factorial of a positive integer. The specific are as follows loop (with a while loop) should be added to ensure that the (1) The user is asked to enter a positive integer, an input validation user has entered a valid number (2) After the calculation the factorial of the entered number using a for loop. The factorial of number X is calculated as:123...X. For example, the factorial of 5 is 1 23 45 120. Enter a positive number: -7 arning! Please enter a positive number: arning! Please enter a positive number: arning! Please enter a positive number: 5 The factorial of 5 is 120 9 0