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An entity is an object or a set of data that has an identity that persists changes of its attributes. In an object oriented context, it usually refers to long-lived information relevant for the stakeholders of the system.

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Do objects in OOP have to represent an entity?

Classes are used for several completely unrelated things. First they are used as data types (a class of data), to be able to collect potentially polymorphic sets of functions or procedures on specific …
Erik Kaplun's user avatar