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Modern casino slot machines are controlled by a computer, and the winning percentages are pre-programmed into the game software.

Casino slot machine games have RNGs that are continually generating combinations, even when the machine is not active.

Running side by side with the RNG of the casino one-armed bandit is the pay out %.

The pay out per cent controls how much the slot machine game will pay, for eg the pay percent may be ninety per cent, which means the slot machine game will payout ninety per cent of all the wagers played, … the casino only gets to keep 10 per cent.

This is not to say that each time you bet 10 credits you will receive nine in return – where’s the fun and excitement in that? Instead, the casino slot won’t pay out for a little while, and then suddenly go on a hot streak and you might hit a big jackpot.

The payoff percentages will definitely vary between the differing games and a handful of the highly famous casinos, for example Golden Online Casino, which puts forth a payout rate of up to 95 percentage!

Therefore, in essence, the one-armed bandit takes all the currency played into it and pays it out to some fortunate winners. The casino only gets to keep a relatively small percentage of all the bets allotted.

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

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