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