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Kotlin is now an official language on Android. And its fully supported in Android Studio 3.0 and higher. Now it's easy to create new projects with Kotlin files, add Kotlin files to your existing project, and also you can convert Java language code to Kotlin. Now lets see the Advantages of Kotlin.     1. Concise - Drastically reduce the amount of boilerplate code     2. Safe - Avoid entire classes of errors such as null pointer exceptions     3. Interoperable - Leverage existing libraries for the JVM, Android, and the browser     4. Tool-Friendly - Choose any Java IDE or build from the command line To be continued... 

If you are completely a beginner for Android Application Development and want to set up a development environment in your system go ahead and follow below instructions. Download JAVA Download and install latest Java JDK from this  link Download Android Studio Make sure your system meet the minimum requirements to install Android Studio Minimum Requirement for Windows is:  64 bit distribution OS with Minimum 4GB RAM (But I am strongly recommend 8GB) and 250 GB free space in Hard disk.  If your system meet the minimum requirements go ahead and download and install the latest version of  Android Studio Note:  Android studio is quite larger file and it takes more than few minutes to download and install depending upon your internet speed and System.