Object is a component of the program which knows how to carry out some actions and interact with other pieces of a code. Functions which previously have been described as the "black boxes" takes the input and spit out the output. An objects can be thought as a "smart" black boxes. which know how to do more than one specific action, and also they can store own set of data. Designing the program with an object allows the programmer to model a program after a real world.

Here is a "Player" object. This object have attributes healthh, strength and ability. These attributes in terms of Programming language are called as data members. The various actions that a player oject can perform are move, attakMonster and getTreasure, These actions are called memeber Functions.

There is a distinction between object and the instance of an object. Object is the definition or a template for its instances. And instance is the actual thing which can be manipulated. For example we have one instance of the player object with certain values:

Here is one instace of the object "Player" with the values for health, strength and ability as 16, 12 and 14 respectively.