Objects are the fundamental building blocks of object oriented programming, and understanding them is crucial for any programmer. An object is a collection of data and functions that work together to perform some specific task. In other words, an object can be thought of as a self-contained entity that has its own properties and behaviors. In this tutorial , we will take a closer look at objects, understand their importance in, and learn how to create and use them in programming.

Table of Contents :

  • OOPs Concepts - Objects
    • Real World example of Objects

OOPs Concepts - Objects :

  • An object is an instance of a class.
  • It is the most basic unit of object oriented programming.
  • Objects contain data and the code to process that data.
  • An object has a state and behavior.
    • state is defined by the data of the objects
    • behavior is defined by the functions of the objects.
  • Memory is allocated only when we create an object.
  • In other words memory is not allocated when we define a class, but memory is allocated when we instantiate it.
  • There can be many objects that belong to a single class.
  • Every object of a class has a unique identity. 
  • Hence an object of a class has - 
    • state - defined by the data members of the class
    • behavior - defined by the data functions of the class
    • identity - every object of a class is different from other objects.
  • Each object of a class contains same type of data and functions that were defined in the class.

Real World example of Objects : 

In our previous example of Vehicles class that we create in the previous tutorial on Classes :

  • Car can be an object.
    • The value of "number of tires" for car will be 4
    • The value of "top-speed" for car can be 250.
  • similarly scooter can be an object of Vehicles class - 
    • The value of "number of tires" for scooter will be 2
    • The value of "top-speed" for scooter can be 100.

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