Object Oriented Programming - Key Terms

Object-Oriented Programming - involves solutions being constructed by means of objects that interact with each other. Using objects means programs can be broken down into parts.

Classes - templates used in OOP to construct objects.

Attributes - variables associated with it.

Methods - subroutines that form the actions an object carries out.

Instantiation - The creation of objects is called ‘instantiation’. When creating an object we create an instance of the class.


Inheritance - where a class retains the methods and attributes of its parent class as well as having its own. Means one class can be coded and used multiple times for similar objects.

Encapsulation - is the process of keeping objects attributes private so they can only be accessed and changed via public methods.  Means object can only behave in expected ways, no unforeseen circumstances.

Polymorphism - means that objects of different types can be treated in the same way.






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