What is an action function on an object referred to as?

An action function on an object is referred to as a method. In object-oriented programming, a method is a function that is associated with an object or class. Methods define behaviors that can be performed by the object, allowing it to interact with other objects, change its state, or perform computations. For instance, if you have a class representing a car, methods could include actions like startEngine(), stop(), or accelerate(), which all represent actions the car can perform.

Each of these methods is defined within the context of the object's class and can manipulate its properties or attributes, which store the object's data. Properties or attributes refer to the characteristics or state of an object, while events are actions that occur in response to occurrences within the application, such as user interactions. Understanding the distinction between methods, properties, and events is crucial in leveraging object-oriented design effectively.