Object-oriented programming (OOP) is a style of programming that focuses on using objects to design and build applications. Contrary to procedure-oriented programming where programs are designed as blocks of statements to manipulate data, OOP organizes the program to combine data and functionality and wrap it inside something called an "Object".

If you have never used an object-oriented programming language before, you will need to learn a few basic concepts before you can begin writing any code. This chapter will introduce some basic concepts of OOP: