# The factorial of a number is the product of all the integers from 1 to that number

num = int(input('Enter a number: '))

factorial = 1

if (num < 0):
    print('Factorial does not exist for negative numbers')
elif (num == 0):
    print('Factorial of 0 is 1')
else:
    for i in range(1, num + 1):
        factorial = factorial * i
    print('The factorial of ', num, ' is ', factorial)
