Установите котлин
Simple Way :
1. first install latest version of java-JDK
JDK version should be greater than 1.6
"If are new to kotlin and want to learn it "
2. install intellj idea and inside intellj idea install
kotlin pulgin from pulgin window during installating
"If you are android developer"
3. install android studio and and kotlin project init
it will automatically install kotlin
android developer