"""
 jimfactorial.py

 playing around with factorial in class
""" 

def fact(n):    
    """ Return n! , the factorial of n.
        >>> fact(5)
        120
    """
    result = 1
    for i in xrange(n):
        result = result * (i + 1)
    return result

if __name__ == "__main__":
    import doctest
    doctest.testmod()