Python program to find factorial

# Author: CppBuzz.com
# This program finds factorial of any number
# Date: 22nd Aug 2020

def factorial(number):
    """This function finds the factorial of the number passed as argument"""
    if number < 0:
        print('Invalid entry! Cannot find factorial of a negative number')
    if number == 0 or number == 1:
        return 1
    else:
        return number * factorial(number - 1)


if __name__ == '__main__':
    number = int(input('Enter any number8: '))
    print(factorial(number))