The interface of an object is exposed via instance properties and instance methods.

These are the most "basic" members on a class.

Properties

Properties are variables of any type defined on the class.

class Cat {
  String name; // property
  String color; // property
  int age; // property
}
// useage:
var cat = Cat();
cat.name = 'Wallace'; 
print(cat.name);

Methods

Methods are functions on a class that provide behavior for an object. Instance methods on objects are exposed via instances of the class. They have access to other variables and methods on the instance, as well as the keyword this.

class Cat {
  String name; // property
  String color; // property
  int age; // property
  void talk() {
   print('meow!');
  }
}
// useage:
var cat = Cat();
cat.talk();