WSQ09

WQ09 Factorial

print()
print()
print("This program is used to calculate de factorial number ")
print("of a positive integer")
print()

validacion=0

while validacion==0:
    print("Introduce an integer number: ")
    num=int(input())

    def factorial_0 (a):

        a=1

        return a

    def factorial_num (a,b):

        while b>1:

            b=b-1
            a=a*b

        return a
        return b

    if num==0:
        factorial_cero= factorial_0(num)

        print("The factorial number of 0 is: ", num)
    else:
        contador=num
        factorial= factorial_num(num,contador)

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

    validacion=3
    while validacion==3:
        print()
        print("Do you want to try it again?(y/n)")
        r=str(input())
        print()

        if r=="Y" or r== "y":
            validacion = 0
        elif r=="n" or r== "n":
            print("Goodbye ;)")
            validacion = 1
        else:
            print("Please enter a valid character")
            validacion = 3