Roullete (also known as Roulette) is a casino game of chance in which a ball is spun around the edge of a wheel to land in one of several designated pockets on the table. The wheel consists of a solid wooden disk slightly convex in shape with a metal rim that has thirty-six compartments painted alternately red and black and numbered nonconsecutively from 1 to 36. On European-style wheels, a 37th compartment, painted green, carries the sign 0. A croupier operates the game.
There are a variety of bets that may be placed. Inside bets are those on specific numbers or groupings of numbers, while outside bets are on colors (red or black), odds (high or low), and first, second and third dozen.
After the bets are made the croupier spins the roulette wheel and tosses a ball into it. When the ball lands in a number or section, winning bettors are paid according to their betting odds. Losing bets are returned to the players, but their original stake is left up for a new bet. Unlike other casino games such as craps, the house edge for roulette bets is relatively constant and not as variable. This makes it a popular choice for beginners.