def get_longitude_direction(longitude_degrees):
    """
    Returns the direction for the given longitude degrees.
    :param longitude_degrees: The degrees (not minutes) as an integer.
    :return: String containing the possible latitude directions (W, E).
    """
    if longitude_degrees is None:
        raise ValueError('No value provided for <longitude_degrees>')

    if longitude_degrees < 0:
        return "W"
    elif longitude_degrees > 0:
        return "E"
    else:
        return ""