Slot machines are designed to be random. They use a component called a Random Number Generator （RNG）. The RNG constantly produces random numbers, even when the machine is not being played. When you press the spin button, the RNG stops at a number that determines the outcome of the reels. 
In regulated markets, these RNGs are tested and certified by independent agencies to ensure true randomness. This means that every spin is independent and has no connection to previous or future spins. It is impossible to predict the result of a spin.
However, the term \“random\“ in slots refers to the mathematical randomness of the RNG. The overall payout percentage of the machine is programmed. While the outcome of each spin is random, the machine is designed to pay back a certain percentage of all money wagered over a very long period. This is how casinos ensure profitability. |
