Understanding how the Random Number Generator (RNG) of a slots game, be it an online slots game or a slot machine, is very simple yet not the easiest of concepts to understand.
The general explanation is that a slots game is programmed with every possible outcome or combination of symbols. A slots game also has an RNG. The RNG is constantly picking combinations even when the game is not eve being played. When a player sits down and hits Spin the RNG will immediately pull one of those combinations and the reels are set to match that combination.
Sounds simple enough but if you stop and try to think about it, it brings to become less easy to understand.
So let’s this explanation I heard of:
Imagine that every single possible symbol combination is written down along with its payout—be that a $0 payout or the jackpot—on an index card. Now imagine a separate RNG. Someone comes up and presses or clicks Spin. The RNG twitters its way to over to the stack of index cards and randomly pulls one. That randomly chosen index card has the symbol spin result and the payout for that spin. The RNG then takes the index card to the reels and the reels then align themselves to match what the index card says. The payout that is on the index card is then given.
That is the simplest and most picturesque way to explain what the RNG actually does in a slots game. It does not determine which symbols and payout are given. It merely takes one of the predetermined results and ferries it to the reels. That is all it does. It does not even do any real thinking.



