Alternative ways to run Kotlin code

Android Studio offers an alternative way of running Kotlin code without the need to run the Android application. This is useful when you want to quickly test some Kotlin code separately from the long Android compilation and deployment process.

The way to run Kotlin code is to use the Kotlin Read Eval Print Loop (REPL). REPL is a simple language shell that reads single user input, evaluates it, and prints the result:

REPL looks like the command-line, but it will provide us with all the required code hints and will give us access to various structures defined inside the project (classes, interfaces, top-level functions, and so on):

The biggest advantage of REPL is its speed. We can test Kotlin code really quickly.