Functional Kotlin

Hello, coroutine world!

Now, let's rewrite our Hello World application with coroutines.

But, hey! What is a coroutine? Basically, a coroutine is a very light thread that runs a block of code and has a similar life cycle, but can complete with a return value or an exception. Technically, a coroutine is an instance of a suspendable computation, a computation that may suspend. Coroutines aren't bound to a particular thread and can suspend in one Thread and resume execution in a different one:

import kotlinx.coroutines.experimental.delayimport kotlinx.coroutines.experimental.launchimport kotlinx.coroutines.experimental.runBlockingfun main(args: Array<String>) = runBlocking {    launch {        delay(1000)        println("World")    }    print("Hello ")    delay(2000