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Polymorphism Is the Key To Open-Closed Principle

The three fundamental pillars of Object-Oriented Programming(OOP) are Encapsulation, Inheritance, and Polymorphism. Polymorphism is likely the least-mentioned concept, possibly because this term is not frequently used in daily life. However, it is actually the most important one because it is the key to achieving compliance with the Open-Closed Principle (OCP) in OOP.