Introduction of OOPs
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This document discusses key concepts in object-oriented programming including class, object, abstraction, encapsulation, inheritance, and polymorphism. It defines class as a user-defined data type that represents logical data but does not occupy memory. An object is an instance of a class that has an identity, state, and behavior. Abstraction hides non-essential details and focuses on what an object does. Encapsulation wraps data and methods together into a single unit. Inheritance allows a new class to reuse and extend an existing parent class. Polymorphism means an object can perform differently in different scenarios.
Introduction of OOPs
- 2. CLASS OBJECT ABSTRACTION ENCAPSULATION INHERITENCE POLYMORPHISM
- 3. Object Oriented Programming (OOP) is a programming model where programs are organized around objects and data rather than action and logic.
- 4. Class is a user defined data type, that has some general identity, state and behaviour. A class will never occupy any memory space and hence it is only a logical representation of data. In OOP languages it is mandatory to create a class for representing data.
- 5. Object is the basic unit of object-oriented programming. Object is an instance of class, that has an identity, state and behaviour. Each instance of an object can hold its own relevant data.
- 6. Abstraction means showing essential features and hiding non-essential features to the user. Abstraction means “FRONTEND”. Abstraction lets us focus on what the object does instead of how it does it ?
- 7. Encapsulation = En + capsule +ation ( Everything In a single capsule). Wrapping up a data member and a method together into a single unit is called Encapsulation. Its hide the data for security such as making the variables public, private and protected.
- 8. When a class includes a property of another class it is known as inheritance. Inheritance is a process of object reusability. New methods and attributes can be created in the new class, but don’t affect the parent class’s definition
- 9. Poly means many one form can perform differently in different scenarios. We will get different results in different scenarios. "Many forms of a single object is called Polymorphism." Polymorphism mainly happens in runtime only.
- 10. 1.Abstraction:- We press the button and result displays on screen. 2.Encapsulation:- There is number of circuits available but they all are binded in a single frame. 3.Inheritence:- Android 10 inherited by Pie. 4.Polymorphism:- Before & after semester examinations.
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