Think of it like giving someone a copy of your house key - they get a copy (pass by value), but they can still use it to change what's inside the house (the underlying data).
fundamental
Programming styles are as varied as the people who write code, reflecting unique approaches to problem-solving. Object-Oriented Programming (OOP) streamlines code through principles like inheritance, polymorphism, abstraction, and encapsulation, making it more modular and reusable.