In mathematics, the notation n! represents the factorial of the nonnegative integer n. The factorial of n is the product of all the nonnegative integers from 1 up through n. For example: 7!=1234567=5,040 and 4!=1234=24

Write a pseudocode that asks the user to enter a nonnegative integer and then displays the factorial of that number.

Please make pseudocode as simple and easy to understand as possible, no C++ or Python.