What is OOP?
OOP is a design philosophy. It stands for Object Oriented Programming. Object-Oriented Programming (OOP) uses a different set of programming languages than old procedural programming languages (C, Pascal, etc.). Everything in OOP is grouped as self sustainable "objects". Hence, you gain re-usability by means of four main object-oriented programming concepts.
In order to clearly understand the object orientation, let’s take your “hand” as an example. The “hand” is a class. Your body has two objects of type hand, named left hand and right hand. Their main functions are controlled/ managed by a set of electrical signals sent through your shoulders (through an interface). So the shoulder is an interface which your body uses to interact with your hands. The hand is a well architected class. The hand is being re-used to create the left hand and the right hand by slightly changing the properties of it.
Basic Principle of oops:- There are main three core principles of any object oriented languages.
- ENCAPSULATION:- Encapsulation provides the ability to hide the internal details of an object from its users.The concept of encapsulation is also known as data hiding or information hiding. In c# , Encapsulation is implemented using the access modifier keywords.
- Public
- Private
- protected
- Internal
- Protected Internal
- POLYMORPHISM:- It is also concept of oops. It is ability to take more than one form. An operation may exhibit different behaviour in different situations. Ex:- An addition operation involving two numeric values will produce sum and the same addition operation will produce a string.If we pass parameter numeric value then method return sum(numeric value) and if we pass parameter String then same method is return string value .this called Polymorphism.
- INHERITANCE:- One class can include the feature of another class by using the concept of inheritance.In c# a class can be inherit only from one class at a time.Whenever we create class that automatic inherit from System.Object class,till the time the class is not inherited from any other class.
