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Modern casino one armed bandits are controlled by computer chips and software, and the winner percentages are preprogrammed into the gaming software.

Casino slot machines have RNGs which are constantly generating combinations, even when the machine is not being played.

Running in sync with the RNG of the casino slot machine game is the payout percentage.

The pay out per cent controls just how much the slot machine will pay, for example the pay % may be ninety percent, meaning the slot machine game will pay out 90% of all the wagers played, and the casino simply gets to keep ten percent.

This really does not mean that every time you bet 10 credits you will receive 9 in return – where’s the fun … exhilaration in that? Instead, the casino slot machine just will not payout for a bit, and then suddenly start up a hot streak and you might hit a big grand prize.

The pay out %s will tend to vary between the assorted games and a handful of the extremely common casinos, e.g. Golden Online Casino, which tenders a payout of up to 95 per cent!

As a result, in essence, the slot machine game takes all the currency played into it and pays it out to a number of chosen winners. The casino only gets to keep a fairly indistinct % of all the plays placed.

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

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