How to Start

• Official website
• Try Kotlin Online online playground including various examples

Learning Resources

• Kotlin for Android (I~IV)
• Streamline Android Java Code with Kotlin
• Android development with Kotlin
• Building APIs on the JVM Using Kotlin and Spark
• Using Project Kotlin for Android
• Kotlin for cross platform mobile app development
• Learn Kotlin while developing an Android App
• Writing Vaadin WebApps In Kotlin (I~V)

Setup

It depends where are you using Kotling for:

• Android
• Javascript
• Native
• Server side

IDEs

• Getting Started with IntelliJ IDEA