Objects should be encapsulated. The rest of a program should interact with an object only through a well-defined interface.

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Encapsulation is a fundamental principle of object-oriented programming that involves bundling the data (attributes) and methods (functions) that operate on the data into a single unit, or class, and restricting access to the internals of that class from the outside world. This is typically achieved through the use of access modifiers (like private, protected, and public in languages such as Java and C++). The rest of the program interacts with an object through its public interface, which consists of public methods that provide a controlled way to access and modify the object's internal state. This approach enhances modularity, maintainability, and security of the code.

Objects Should Be Encapsulated