What will happen to the variable when multiple coroutines are run?

Determine what result will be printed to the console after executing the following code:

val scope = CoroutineScope(Dispatchers.Default + SupervisorJob())
var i = 0

fun main() = runBlocking {
    repeat(100000) {
        increase()
    }

    println(i)
}

fun increase() = scope.launch {
    synchronized(this) {
        i++
    }
}