Roullete is a casino game in which players place bets on the outcome of a spinning wheel. The game is easy enough for beginners to understand and play, yet it offers a number of betting options that can appeal to experienced gamblers. It is one of the few games in which a mathematical strategy can improve your odds of winning, although it requires a decent bankroll to be effective.

A Roulette wheel consists of a spinning disk with divisions that are numbered in a seemingly random pattern from 1 to 36. The numbers alternate between red and black, with a green division numbered 0. On European-style wheels there is an extra green compartment on the opposite side of the spindle from the zero, while American tables have two additional green pockets on opposite sides of the wheel. The compartments, or “canoes” as they are known by roulette croupiers, have metal separators that keep the balls from interacting.

After you’ve made your bets, the croupier (or dealer) will throw a small ball into the wheel and watch it as it spins around. When the ball comes to rest in a pocket that is marked with a specific number, you win. Before the croupier throws the ball, you can still be wrapping up your bets on the table. You do this by placing chips on a betting mat, with the precise location of the chips indicating the type of bet you have placed.

Players can make a wide range of bets, from single numbers to various groupings and color combinations. The payout odds for each of these bets are based on the probability of each event occurring. Bets on individual numbers are called inside bets, while bets on other sections of the board are called outside bets. Some bets, such as high-low or odd-even, are also grouped into dozen bets. This bet pays out at odds of six to one, and is therefore considered an outside bet.