encapsulation
In general, encapsulation is a process of wrapping similar code in one place.
Encapsulation is one of the key features of object-oriented programming. It involves the bundling of data members and functions inside a single class.
Bundling similar data members and functions inside a class together also helps in data hiding.
Note: People often consider encapsulation as data hiding, but that's not entirely true.
Encapsulation refers to the bundling of related fields and methods together. This can be used to achieve data hiding. Encapsulation in itself is not data hiding.