def mean(*args):
    """
    Calculates the mean of a list of numbers
    :param args: List of numbers
    :return:  The mean of a list of numbers
    """
    index = 0
    sum_index = 0
    for i in args:
        index += 1
        sum_index += float(i)

    return (sum_index / index) if index != 0 else "Division by zero"