i.
                  What You Need
                
              
            
          To follow along with this book, you need:
- 
IntelliJ IDEA Community Edition 2019.1.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.
 - 
Android Studio 3.x: Available at https://developer.android.com/studio/. This is the environment in which you’ll develop most of the sample code in this book.
 
              
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                ii.
                Book Source Code & Forums