Online slots have evolved from traditional casino games that rely solely on chance to win cash to more sophisticated games that are based on skill. These types of slots incorporate elements of gamification, such as bonus rounds, to increase the fun factor. For example, fighting theme slots require players to defeat fictional characters to win money.

Slot machines also have a theme, which can be aesthetic, character-based, or location-based. This theme is used to guide the design of the symbols, bonus features, and gameplay. Themes are often based on popular film and media franchises and can make for more engaging gameplay. But while this may sound like a boring way to spend time with friends, younger gamblers may find skill-based slot games more appealing.

Unlike mechanical machines, modern slot machines can be programmed to perform complex calculations and are far more flexible. They are no longer constrained by the size of reels, which hampered the size of jackpots and payouts. Moreover, because they are computer-programmed, modern slots can have multiple stops and several different symbols per reel.

Many slot machines have a paytable, which lists the amount of credits a player receives if all of their symbols line up. This information is displayed on the machine’s face. Older machines often have these tables listed above and below the wheels, but modern video machines also provide a paytable in the help menu.