What You Need
To follow along with this book, you need:
IntelliJ IDEA Community Edition 2021.1.x: Available at https://www.jetbrains.com/idea/. This is the environment in which you’ll develop most of the sample code in this book.
Kotlin Playground: You can also use the Kotlin Playground available at the Kotlin home page at https://play.kotlinlang.org.
Next chapter ii. Book Source Code & Forums