OOP

Summary

Object-Oriented Programming — structuring code around objects with encapsulated state and behavior, using classes, inheritance and polymorphism. OOP is one way to organize software around state and behavior, and its usefulness depends on whether objects and relationships actually fit the problem being solved.

• 1Model a small real-world domain (e.g. a library) with classes and relationships. Validate your understanding by applying it in a small practical example.
• 2Practice encapsulation using private class fields (`#field`). Test it with at least one normal case and one edge case so you can explain the behavior confidently.
• 3Compare an OOP solution to the same problem solved functionally.