"""
This is a doc string for the whole module.
"""


class Person
    """
    This is a class declaration.
    """

    var _name as String  # declare a class variable. every instance of Person will have a name

    def init(name as String)
        _name = name

    def sayHello
        # This is a method

        # In strings, anything in brackets ([]) is evaluated as an expression,
        # converted to a string and substituted into the string:
        print 'Hello. My name is [_name].'

    def add(i as int, j as int) as int
        """
        Adds the two arguments and returns their sum.
        """
        return i + j


class Program

    def main is shared
        # Create an instance
        p = Person('Bob')

        # Invoke a method
        p.sayHello

        # Invoke a method with arguments
        print p.add(2, 2)

        # Assert the truth of something
        assert p.add(2, 2)==4