Abstraction can be formally defined as the representation of an object including the specification of that object in a certain context.Abstraction is a powerful means to tackle the complexity of programming by wrapping up and thus reducing the complexity of complex operations.
Abstraction is used in OOP(Object Oriented Programming) Languages like Java,C++ etc.These OOP Languages employ an abstract entity called class from which instance of that class called object can be created.Data and Code are Binded together in a syntactic container called Object.
Data Hiding is a Concept of Abstraction by which the Code and the Data in an Object(Instance of an Abstract Data type usually referred to as class) is hidden from the external entities.
