What are Access modifiers ?

• One of the key features of data hiding is achieved through private keywords
• The class members which have been declared private can be accessed only within from the class not from outside.
• Only member function can access the private data.
• On the other hand public member can be accessed from outside the class.
• By default all the members of the class are private.
• The binding of data and function together into a single type class is referred as Encapsulation.

A simple class Example

class item
{
       Private:
       Int number;
       Float cost;
       Public:
       Void getdata(int a , float b);
       Void putdata();
 };

• Here the name of class is item. 
• It contains two data members and two function members. 
• The two data members number and cost are private and can accessed by member function getdata and putdata only.