Cancellation using cancel() and join()

Coroutines.kt

import kotlinx.coroutines.*

fun main() {
    runBlocking {
        println("Start main")

        val job = launch {
            repeat(300) { waitingTime ->
                println("Job is waiting $waitingTime...")
                delay(50L)
            }
        }
        delay(300L)
        println("Stop waiting. Let's cancel it...")
        job.cancel()
        job.join()
        println("End main")
    }
}