What Are the Symbols in a Slot Machine?


A narrow notch, groove, or opening, as on a door or a slit for coins in a vending machine. Also: a position in a group, series, or sequence.

In the past, slot machines were all-or-nothing affairs: yank the lever and either everything lined up or nothing did. But better computer technology has allowed casinos to control the percentage payback and odds.


Symbols in slot machines are often the source of confusion for players, but there are three essential types that every player should know about. Standard symbols pay out a fixed amount of money when they appear in a row on an enabled payline. Multiplier symbols increase the payout of any winning combination they land on. Bonus symbols trigger special features that can increase your payouts even more.

The first slots used poker cards and horseshoes as symbols, but when Charles Fey invented the one-armed bandit, he reduced their number to three and kept only card suits: diamonds, hearts and spades. These symbols can still be found on some slot machines today, along with classic fruit symbols and bars and bells.

Modern slot games use symbols that match their overall theme. Some of these symbols are simple, while others are more elaborate. For example, a pirate-themed slot may include symbols like a ship, fish, treasure chest, parrot, and anchor.


Payouts in slot machines are determined by the probabilities of winning certain symbols. A high probability means more frequent but smaller wins, while a low probability means less frequent and larger wins. This is why different slots have varying payouts and are better or worse for beginners depending on their volatility.

Modern electronic slot machines are regulated by state gaming regulations. These include a minimum theoretical percentage that a machine must hold, reel strip settings, and more. Some also have tilt switches, which detect any kind of tampering or movement and can signal an alarm.

In the past, slot players would insert cash or a paper ticket with a barcode into a slot to activate it and earn credits based on a payout table. Then the reels would spin and stop to reveal a series of symbols, earning credits based on the player’s winning combination. Each machine has a unique theme and various bonus features aligned with that theme.

Bonus rounds

Many slot games feature bonus rounds that can make a player’s gambling experience more fun and exciting. These rounds are often triggered by landing specific scatter symbols or winning combinations. They can offer instant payouts, free spins, multipliers, and more. These extra features can also be used to trigger jackpots.

Some bonus rounds are a special session of free spins, while others have different or modified game mechanics. They can also include a collectable symbol mechanism or hold and re-spin functionality.

A good bonus round does not have to deliver life-changing amounts of money, but it should be entertaining enough to keep players engaged. Some bonus rounds involve a pick ‘em round where players select different symbols to reveal prizes, while others take the player to a second screen and offer a choice of mini-games. Examples of these are the Ripley’s Believe It or Not quiz and the Anime Professor Chaos. In some cases, players can buy a bonus round for additional credits. However, this type of bonus round can burn through a player’s bankroll quickly and is not recommended for those with gambling problems.


In order to win a payout on a slot machine, you must line up matching symbols across one or more paylines. You must also check the paytable to see how much the game pays. This information can help you select a slot that is suited to your personal preferences and bankroll size.

Before a slot machine can be used in a casino, it must pass a series of tests and inspections to ensure that its software is up to date and the game is operating correctly. In addition, the slot must be certified by a gaming company. The certification process is a critical part of ensuring that a slot has the proper random number generator, which is an important component of gambling games. The certification company is responsible for testing the slot’s software to ensure that it is not tampered with. Moreover, the company is responsible for inspecting the machine to ensure that it meets all regulations.