CoroutineScope(Dispatchers.IO).launch{ print("This is before delay") delay(1000) print("This is after delay") } why does it not print after delay text

Where are you running this? If it’s just a main function, I think the IO dispatcher’s thread pool might use daemon threads?

I am not using runBlocking just running in to the main function

Coroutines are like daemon threads and use daemon threads for standard dispatchers thread pools. Your program finished before delay is finished You can use runBlocking or suspend main()