Encapsulation

Encapsulation or Data hiding or Information hiding.

In Object-oriented Programming Encapsulation is a technique to hide or restricted the access to the properties and behaviours of an object.

Also,

Encapsulation  is a process of wrapping code and data together into a single unit, for example a capsule in which mixed of several medicines.

Encapsulation mechanism keeps the data and the code safe from external interference.

Example :

Access restriction to the properties and methods by using the keywords private, public, protected in a class.