Google announced support for Kotlin in Android at Google I/O 2017. Kotlin is a new programming language from JetBrains. It first appeared in 2011 when JetBrains unveiled their project named “Kotlin”. Kotlin is an Open-Source Language. It legitimately is an improvement on Java in many syntactical ways. Now we have two major languages to develop android application Java and Kotlin.You can use Android Studio, Eclipse, IntelliJ IDEA or a standalone compiler to build Kotlin apps for Android or your web browser.