Introduction

What is object-oriented programming? Object-oriented programming (OOP) is a specific model of computer programming for the organisation of design software in the region of data, or objects and not around logic and functions. A data field having attributes and behaviour that are unique is known as an object. Developers often want to manipulate the objects, this is where OOP is required, however, the logic required for the manipulation is not the focus of OOP. Therefore, OOP deals with those large and complex programs that are actively maintained or updated. This includes mobile applications, manufacturing, and design programs. For instance, manufacturing system simulation software can use OOP. 

Building Blocks of Object-Oriented Programming

The structure of object-oriented programming is formed with these building blocks/parts:-

• Classes- A type of data as defined by the user is a class. It performs as the blueprint, in the case of individual objects, methods, and attributes.
• Objects- It is specifically defined data that falls under a specific class created. Objects can correspond or deal with abstract entities or real-world objects. 
• Methods- Inside a class there are certain defined functions that describe the object along with its behaviours. In class definitions, the method starts with reference-drawing to the instance object. Moreover, Instance methods are the subroutines contained within an object. The use of methods by programmers is to keep the functionality encapsulated inside an object or for reusability. 
• Attributes- It represents the state or condition of an object. In the class, template attributes are defined. The data of the objects are stored in the field of attributes. 

For instance, the name of a person is an object. The class it falls under is- Human. The attributes can be the contact number, email address of the person. Methods can be verification, sending mails, etc. 

Steps in Object-Oriented Programming

The objects that are to be manipulated are collected. Then it is to be identified as to how they can be related to each other, this is referred to as data modelling. Objects can be dealing with physical entities like humans or smaller computer programs like widgets. When the object is known, a class of objects is a label the object is put into. The class of objects showcases the logic sequence required for manipulation or what kind of data it carries. Methods are these distinct logic sequences. Objects can then communicate with messages, which are well-defined interfaces. 

The job of object-oriented programming C++ is to work around object orientation in the case of the C programming language. This area deals with concepts like inheritance, polymorphism, abstraction, and encapsulation. When an object has all those properties as well as behaviours present in that of a parent object, it is known as inheritance. Moreover, the different ways and means through which one task is performed are known as polymorphism. Function overriding and function overloading is used to achieve polymorphism in C++. Just showcasing the functionality while hiding internal details, is referred to as abstraction. Abstract interface and class are used for the process in C++. 

Languages in Object-Oriented Programming 

The following object-oriented programming languages are the most popular ones:-

• Java- The popularity of java is unmatched. It is the most in-demand language. It is running on several platforms and places. The usefulness of Java is reflected through its motto- running everywhere by writing just once. 
• Python- The popularity of python comes from its strong foothold in data science and machine learning. 
• C++- The speed provided by C and the functionality from the classes make it a paradigm that is highly object-oriented. It’s a powerful, reliable, and compiled language. It even helps in building interpreters and compilers for other languages. 
• Ruby- It is a language of general-purpose programming. It is simple in appearance but complex from the inside and has a very powerful language.
• C#- This language has been designed by Microsoft. It is the language that powers many games, web apps, Microsoft.NET, mobile apps, and so on. 

Other than these languages, there exist many more object-oriented languages like Perl, Dart, Scala, JADE, Emerald, JavaScript, Lisp, Objective-C, and PHP. 

Conclusion

The topic of object-oriented programming has been covered by answering questions like what is object-oriented programming. The building blocks of object-oriented programming have been introduced and explained. The various steps of programming in OOP have also been covered. Moreover, the various important programming languages used in OOP have also been introduced and the most popular ones have been elaborated on. The FAQs section intends to address the most probable queries that might arise. The FAQs section enhances the understanding of the topic- object-oriented programming through the inclusion of additional information.