practical_coroutines_9.kt

runBlocking {
    val scope = CoroutineScope(Dispatchers.IO)
    val j = scope.launch {
        println("Inside parent job")
        delay(50)
        val p = launch {
            println("Inside child job")
            // Notice how we now removed the isActive check
            // to demonstrate that if a scope is cancelled,
            // even an uncooperative coroutine is stopped
            while (true) {
                print(0)
            }
            println("\nEnding of child job")
        }
        p.join()
        println("Ending of parent job")
    }
    delay(50)
    scope.cancel()
}

Output:
Inside parent job
Inside child job
00000.....000000
// Notice how since the scope was cancelled, 
// the "Ending of..." statements aren't printed. 
// The execution was simply stopped.