Abstraction is an object-oriented programming paradigm that "shows" the essential features while "hiding" irrelevant data. The basic goal of abstraction is to keep consumers away from superfluous information.
Abstract classes are classes that cannot be instantiated, that is, their object references cannot be formed, and that have one or more abstract methods. An abstract method is one that can just be stated and does not have any implementation.
Abstraction obscures certain details, revealing just the object's basic characteristics. It seeks to simplify and factor out details so the developer can concentrate on a few key principles at a time. This approach increases the code's understandability and maintainability. We can reduce code duplication by using abstraction.
Apart from physical realities, specific things, or actual instances, seeing something as a general trait or attribute. something imaginative and fantastic; an unreasonable concept
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