There are a lot of things operator overloading can do, and we have used quite a few features here. Check out how we increment a count of online users:
numOfUsers = numOfUsers.inc()
It is a much more readable code compared to numOfUsers = numOfUsers+1, umOfUsers += 1, or numOfUsers++.
Similarly, we can decrement any number by using the dec() function.
Operator overloading applies to the whole set of unary operators, increment-decrement operators, binary operators, and index access operator. Read more about all of them at https://kotlinlang.org/docs/reference/operator-overloading.html.
