Everything in OOP is grouped as self sustainable "objects". In object-oriented programming, the process of programming involves the following steps: Create classes for defining objects and their behaviors. In my opinion, this is a … The four principles of object-oriented programming are encapsulation, abstraction, inheritance, and polymorphism. Procedural Programming takes a more top down approach to writing an application and while a developer who uses Object-oriented Programming to create applications would think of planning out the program with re-usable classes, a developer who uses Procedural Programming might plan out the program without the idea of recycling code. These words may sound scary for a junior developer. Wikipedia defines OOP like this: "Object-Oriented Programming (OOP) is a programming paradigm based on the concept of "objects", which can contain data, in the form of fields (often known as attributes), and code, in the form of procedures (often known as methods)." No, not by copying and then pasting the same code from one block to another and from there to another and so on. Ad hoc code reuse has been practiced from the earliest days of programming.Programmers have always reused sections of code, templates, functions, and procedures. Software reuse as a recognized area of study in software engineering, however, dates only from 1968 when Douglas McIlroy of Bell Laboratories proposed basing the software industry on reusable components. Hence, you gain re-usability by means of four main object-oriented programming concepts. OOP (object-oriented programming) is a programming paradigm that is completely based on ‘objects’. Object-oriented programming (OOP) is a fundamental programming paradigm used by nearly every developer at some point in their career. A good understanding of OOPs concepts can help in decision making when designing an application. And the complex, excessively long explanations in Wikipedia sometimes double the confusion. This approach to programming is well-suited for programs that are large, complex and actively updated or maintained. A general explanation of ‘object’ for better understanding – Mr. A is going to build a POT with the use of BLOCKS. The organization of an object-oriented program also makes the method beneficial to collaborative development, where projects are divided into groups. Inheritance helps in the software re-usability by using the existing components of the software to create new component. Object-oriented programming is built around a number of concepts. In object oriented programming protected data members are accessible in the child and so we can say that yes inheritance promote software re-usability. These concepts are implemented using classes, objects and methods, but it is useful to review those concepts more generally. In the class-based object-oriented programming paradigm, “object” refers to a particular instance of a class where the object can be a combination of variables, functions, and data structures. Object-Oriented Programming (OOP) uses a different set of programming languages than old procedural programming languages (C, Pascal, etc.). Object-oriented programming (OOP) is a programming paradigm based on the concept of "objects", which may contain data, in the form of fields, often known as attributes; and code, in the form of procedures, often known as methods. Reusability In programming, reusable code is the use of similar code in multiple functions. How you should design an application and what language should be used. Blocks are a kind of measurement units like height, radius, and shape by default. It stands for Object Oriented Programming. 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