Why, when increasing the number in coroutines, the number sometimes has a different value?

Question

Kotlin

1) Why, if I write this code, then in runBlocking I sometimes change the value of the variable, sometimes it is 20,000, and sometimes a little less, but if I delete the entire CoroutineScope and leave only runBlocking, then my variable value is always 10,000 2 )
And why in general in the first case, when there is both coroutineScope and runBlockin, my variable tends to 20,000 in both cases, and not to 10,000? It feels like the repetitions are trying to add up, but in runBlockin they add up crookedly.

The code:

val int = AtomicInteger()

            CoroutineScope(Dispatchers.IO).launch {
                repeat(100) {
                    launch {
                        repeat(100) {
                            int.incrementAndGet()
                        }
                    }
                }
                Log.e("@@@ CoroutineScope @@@", int.toString())
            }


        runBlocking {
            withContext(Dispatchers.IO) {
                repeat(100) {
                    launch {
                        repeat(100) {
                            int.incrementAndGet()
                        }
                    }
                }
            }
            Log.e("@@@ withContext @@@", int.toString())
        }

Screenshots:

Answer 1

Discussed in a comment (: The log is printed before all coroutines have finished incrementing the counter