This chapter will introduce the reader to the details of using Kotlin programming with Spring Boot 2 as the base application development framework. It will explain what Kotlin is and how to get started with Kotlin as the main programming language and for testing purposes. Subsequently, it will explain the basic syntax of Kotlin, followed by coding conventions, coding basics, class concepts, and so on. Furthermore, it will delve into the advanced functionalities of Kotlin, such as lambdas, annotations, reflection, and many more, to provide a deep understanding of the programming language. 

The following topics will be covered in this chapter:

• Getting started with Kotlin
• Object-oriented programming with Kotlin
• Advanced programming with Kotlin