Modern casino slot games are controlled by a computer, and the win percentages are preprogrammed into the software.
Casino Slots have Random # Generators that are continually generating combinations, even when the slot machine is not currently being played.
Running side by side with the Random Number Generator of the casino slot machine is the pay out rate %.
The payout percentage controls how much the one-armed bandit will pay out, for e.g. the payout percent might be ninety percent, which means the slot machine will pay ninety percent of all the wagers played, and the casino gets to keep 10%.
This really does not mean that each time you bet ten credits you will receive 9 in return – where is the fun and exhilaration in that? Instead, the casino slot machine will not payout for a little while, and then suddenly fire up a hot streak and you might draw the big grand prize.
The payoff %s will very likely vary between the various games and a couple of the most common casinos, for example Golden Online Casino, which gives a cash payment of up to ninety-five percentage!
Thus, in essence, the slot machine takes all the dough played into it and pays it out to a couple of fortunate winners. The casino only gets to keep a fairly tiny per cent of all the bets allotted.
The casino one armed bandit software controls each and every part of the machine, from the flashing lights to the spinning of the reels.
When you hit spin on the slot machine, a combination is produced by the RNG which corresponds to the pictures on the reel.