Kotlin Programming Cookbook

How to do it...

Now we are ready to run our first program using the command line. First, we will create a simple application that displays Hello World! and then compile it:

1. Create a file with the name hello.kt and add the following lines of code in that file:

fun main(args: Array<String>) {    println("Hello, World!") }

2. Now we compile the file using the following command:

$ kotlinc hello.kt -include-runtime -d hello.jar

3. Now we run the application using the following command:

$ java -jar hello.jar

4. Suppose you want to create a library that can be used with other Kotlin applications; we can simply compile the Kotlin application in question into .jar executable without the -include-runtime option, that is, the new command will be as follows: ...