Modern casino slot machine games are controlled by a computer, and the win percentages are preprogrammed into the software.

Casino one armed bandits have RNGs that are eternally generating combinations, even when the slot machine is not being played.

Running collectively with the RNG of the casino one-armed bandit is the payout percentage.

The payout percent controls how much the slot machine will pay, for e.g. the pay out percent may be ninety per cent, which means the one arm bandit will pay ninety percent of all the bets played, and the casino only gets to keep ten per cent.

This does not mean that for every time you bet 10 credits you will receive nine in return – where is the fun … excitement in that? Instead, the casino slot machine will not pay out for a little while, and then suddenly go on a hot streak and you might draw the big top prize.

The payoff percentages usually will vary between the differing games and a couple of the notably common casinos, such as Golden Online Casino, which offers a payout rate of up to 95 %!

So, in essence, the slot machine takes all the $$$$$ played into it and pays it out to a number of fortunate winners. The casino only gets to keep a fairly small per cent of all the stakes allocated.

The casino slot software controls every single part of the machine, from the flickering lights to the rotating of the reels.

When you hit spin on the slot machine, a combination is produced by the RNG which associates with the pictures on the reel.