Modern casino slot machines are controlled by a computer, and the win %s are pre-programmed into the computer software.

Casino slot machine games have Random # Generators which are endlessly generating combinations, even when the slot machine game is not active.

Running concurrently with the Random Number Generator of the casino slot machine is the pay out per cent.

The pay out per cent controls just how much the slot machine will pay out, for example the pay percentage could be ninety per cent, which means the slot machine game will pay ninety percent of all the stakes played, and the casino only gets to keep ten per cent.

This does not mean that each and every time you bet ten credits you will receive nine in return – where’s the fun … excitement in that? Instead, the casino slot machine game won’t pay out for a while, and then suddenly hit a hot streak and you might catch the big jackpot.

The pay out %s most likely will vary between the different games and a few of the very established casinos, like Golden Online Casino, which provides a cash payment of up to 95 per cent!

Therefore, in essence, the slot machine takes all the $$$$$ played into it and pays it out to some fortunate winners. The casino only gets to keep a generally minute % of all the stakes allotted.

The casino slot software controls each part of the machine, from the blinking lights to the rolling of the reels.

When you hit spin on the slot machine game, a combination is produced by the RNG which corresponds to the pictures on the reel.