The bundling of data with the methods that operate on that data, restricting direct access to some of the object's components.

"Encapsulation in object-oriented programming ensures that an object's internal state is hidden from the outside, only allowing modification through a set of well-defined interfaces."

The bundling of data with the methods that operate on that data.

"Encapsulation in object-oriented programming involves hiding the internal state of an object and requiring all interaction to be performed through an object's methods."