sentence: All objects are created from templates called classes.
sentences_after: You can think of a class as a mold from which objects are made. The class defines all the properties and methods that its objects will have. Objects created from a class are called 'instances' of the class. A class can 'extend' another class, which means that it takes all the properties and methods of the class but can add its own.
concept_name: object
headings: Programming language Object-Oriented Programming