class

We just mentioned that objects contain data, and code to manipulate that data. The entire set of data and code of an object can be made a user-defined data type with the help of a class. In fact, objects are variables of the type class. Once a class has been defined, we can create any number of objects belonging to that class. Each object is associated with the data of type class with which they are created. A class is the collection of objects of similar type.

Classes make things a lot easier when dealing with objects. They do the simplest necessary thing in OOP: they combine data with functions for manipulating data.  For example, mango, apple and orange are members of the class fruit.
 Classes are user-defined data types and behave like the built-in types of a programming language. The 
syntax used to create an object is no different than the syntax used to create an integer 
object in C.

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