Factorial

 num=int(input("Enter a num>>"))

factorial=1

if num<0:

    print("sorry, Factorial does not exiat for negative number")

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:-

Enter a num>>12

The factorial of 12 is 479001600