Slot Machine Symbols and Bonus Features

Slot machines are devices that accept cash or paper tickets with barcodes as payment. These machines spin reels, and any winning combination awards credits based on the paytable. The symbols used on these machines vary widely, but are generally based on a particular theme. Classic symbols include lucky sevens, bells, and fruits. Most slot games also feature bonus features that align with the theme.

Modern slot machine design

Modern slot machines have come a long way since mechanical versions. Today’s machines are all built with pseudorandom number generators, which produce simulated random numbers in sequences that vary by a fraction of a second. In each spin, the most recent random number determines the game result.

Random number generators

Random number generators, or RNGs, are used to create games that are unpredictable. They pick combinations of numbers thousands of times every second. Random number generators use natural sounds and digital abbreviations to create the sounds. Like resistors and semi-conductors, RNGs have no specific algorithm that measures how effective they are. Therefore, the slot machine owner must create the RNG to meet the unique needs of their machine. Most reputable game operators use certified RNGs.

Near-miss elements

In slot machines, a near-miss element is a symbol that appears adjacent to a payline but fails to make the entire win. The player is still paid for the number of times this symbol appears in the vicinity of a payline. The presence of such elements in a game can boost a player’s motivation.


Multipliers are symbols that increase your payouts by multiplying the value of your winnings. They are often hidden in symbols and can range from 2x to 10x. Some slot machines also have wild icons that can double as multipliers. They appear randomly and do not have to be on a payline to double your winnings.

Weighted reels

Weighted reels in slot machines increase the chances of hitting a jackpot. Moreover, these feature more combinations than the standard slots. This can also minimize the number of dead spins and false wins. These features also reduce payout frequency as they require a larger amount of money to give out a single payout.

Bonus rounds

Bonus rounds on slot games are a great way for casinos to increase their player base. They are typically unlocked when a certain combination of symbols appears on the reels. Although bonus rounds do not always result in large payouts, they do increase player engagement and add a fun factor to the game. They are especially valuable to players who are new to online casinos.