def isLeapYear (year):
    """
    Determines if the specified year is a leap year.

    Args:
      year: year to determine if it is a leap year (integer)

    Returns:
      True: yes, this is a leap year
      False: no, this is not a leap year
    """
    if (year % 4) == 0:
        if (year % 100) == 0:
            if (year % 400) == 0:
                return True
            else:
                return False
        else:
            return True
    else:
        return False