practical_coroutines_8.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 check that the job's isActive
            while (true && isActive) {
                print(0)
            }
            println("\nEnding of child job")
        }
        // Cancelling the child job after a 50ms delay
        delay(1)
        p.cancelAndJoin()
        println("Ending of parent job")
    }
    j.join()
}

Output:
Inside parent job
Inside child job
000000....000000
Ending of child job
Ending of parent job