#Jay Summet - Georgia Tech
# Released to the public domain: 2009

def factorial(a):
    print "Factorial called with a of:", a
    if (a == 0):
        return 1
    else:
        result = a * factorial(a-1)
        return(result)



def factorial2(a):

    product = 1
    
    while( a > 0):
        #print "A is:", a
        product = product * a
        a = a - 1
        #print "Product is:", product

    return( product)