Program to calculate factorial of a number.

Code:

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

factorial = 1

if num < 0:

   print("Sorry, factorial does not exist for negative numbers")

elif num == 0:

   print("The factorial of 0 is 1")

else:

   for i in range(1,num + 1):

       factorial = factorial*i

   print("The factorial of",num,"is",factorial)

 

Output: