What is a Slot Machine?


A slot machine is a casino game that accepts cash or paper tickets with a barcode (in “ticket-in, ticket-out” machines). Players activate the machine by pushing a lever or button (either physical or on a touchscreen), which spins reels and stops to rearrange symbols. If the symbols match a winning combination in the paytable, the player earns credits. The number of reels, paylines and symbols varies depending on the machine, but classic symbols include fruits, bells and stylized lucky sevens. Most slot games have a theme, and bonus events and features align with that theme.

Modern electronic slot machines look like their mechanical counterparts, but the odds of hitting a particular symbol depend on the random number generator inside. The visible reels only serve to show you what the computer already picked: For example, if you see a JACKPOT on the first two spins, your odds of hitting it again on the third are much lower than if you had hit that first symbol on the second spin. This effect is called the law of diminishing returns and is one of the reasons why it’s so important to have a plan for when you want to walk away, even if you’re winning.