Factorial of a number

Write a code that calculates the factorial of an integer using either "for loop" or "while loop". The factorial of a number is calculated as following:

$nn(n-1)$cdots$1$

For example, $44**3**2**1=24$

First, you need to prompt the user to input the integer that you will calculate the factorial for. Second, you calculate the factorial of the integer that the user inputted.

Third, you display the value of the factorial that you computed.