Class

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Classes in programming languages are user defined data types. But they behave like built-in data types. Classes are used in object oriented programming paradigm.

Class definition

Class is a collection of objects of similar type or Class is a construct which can be used as a template to create instances of itself known as class objects.

Example of a class in C++ :

class person
{
   private:
     string name;
     int age;
   public:
     void getdata();
     void display
     {
         cout<<"Name: "<<name<<endl;
         cout<<"Age: "<<age<<endl;
     }
};

Here name and age are data-members of the data-type string and integer respectively. Keywords private and public are the access specifiers and getdata and display are the member-functions. A function can be defined inside or outside a class.

The terms encapsulation and information hiding are closely related with class.