Kotlin by Example: Hello World

Our first program will print the classic "hello world" message. Here's the full source code.
	`fun main() { println("Hello world!") }`
As you can see, Kotlin is very concise; it does not require a lot of boilerplate.

To run the program, we first have to compile it.	`$ kotlinc main.kt -include-runtime -d main.jar`
	`$ ls main.kt Main.jar`
Then, we can run the resulting jar file.	`$ java -jar Main.jar Hello, world!`