How does the outcome of an online table game like blackjack get generated compared to a slot machine?

Slots: one algorithm, one instant answer

A slot machine — online or physical — runs entirely on a Random Number Generator. The RNG is a computer chip that makes thousands of mathematical calculations per second. The moment you hit Spin, the RNG freezes on a random set of numbers that determine the corresponding symbols on the reels — the outcome is decided at that exact instant. The spinning animation that follows is purely entertainment. Nothing you do between spins — timing, bet size, how you tap the button — changes anything. Each spin is completely independent from the last, and all previous, spins.

The RNG runs continuously, even when nobody is playing. Whatever random number was generated the split second the player hit the button will result in the corresponding reel combination that appears on screen. The payouts those combinations produce are set by a programmed return percentage baked into the machine's chip — the math is fixed before you ever sit down.

RNG blackjack vs. live dealer blackjack — two different models

Online blackjack comes in two fundamentally different forms, and the outcome generation differs between them.

RNG blackjack works similarly to slots at the mechanical level: Random Number Generators are the devices used to create random results in gambling, and RNGs are used in slots and digital games alike. In a software-dealt blackjack game, the RNG maps random numbers to card values — every "deal" is a fresh draw from a virtually shuffled deck, with no physical cards involved. The sequence of cards you receive is determined by that algorithm, not by any prior hand or any pattern you might perceive.

Live dealer blackjack — the format many Ottawa players gravitate toward on Ontario-registered sites — works completely differently. A real human dealer shuffles and deals physical cards from a shoe, streamed to your screen in real time. Dealers use shuffling skills to keep the game random, and the randomness comes from the physical properties of the shuffle, not software. This is much closer to sitting at a table at Casino du Lac-Leamy across the river.

The crucial practical difference: in RNG blackjack, the deck is effectively reshuffled after every hand (the RNG draws fresh each time), so card counting is meaningless. In live dealer games with a physical multi-deck shoe, some cards are removed from play between shuffles — but while the random chance of the cards means no decision ever guarantees a win, basing your moves on basic strategy can give you an edge over going with your gut. Basic strategy applies to both formats; counting does not work reliably online.

What this means for how you play

The core implication is that blackjack — unlike slots — involves decisions that actually affect your expected outcome. The object of the game is to beat the dealer; you can win by getting a higher total up to 21, or by not busting before the dealer does. Your choices to hit, stand, split, or double down interact with the probabilities of the remaining deck in a way that has no equivalent in slots, where player decisions after the Spin button are zero. A slot's RNG doesn't care what you do; a blackjack hand responds to what you do.

Both game types are offered on sites registered with iGaming Ontario — you can verify any operator you use against the official iGaming Ontario registry, and look for the iGaming Ontario and BetGuard logos on the site as a quick signal that it's properly regulated. If gambling stops being fun, ConnexOntario (1-866-531-2600) is Ontario's free support line, and players 19+ can self-exclude from all registered Ontario sites in a single step through BetGuard at betguard.ca.