Classes and Methods

  class Dog() {
    def bark1 = println("bark");

    def bark2 = {
      println("bark");
    }

    def bark3: Unit = {
      println("bark");
    }

    def bark4() = println("bark");
  }

  val dog = new Dog();
  dog.bark1;
  dog.bark2;
  dog.bark3;
  dog.bark4;
  dog.bark4();