Roullete (or Roulette) is a casino game in which players place bets on which red or black numbered compartment of a spinning wheel will the small ball land when it comes to rest. Bets can be placed by laying chips onto a betting mat; their precise placement indicates which bet has been placed against the house; unlike many other casino games however, no advantage can be gained by understanding specific strategies or techniques for successful play.

Roulette was first recorded at the end of 17th century France, when it first made an appearance there. Likely derived from earlier games such as hoca and portique, its current layout and wheel structure developed over time until 1800s. There have been various legends associated with its invention by 17th-century French mathematician Blaise Pascal among others.

A croupier spins a wheel and throws the ball on it, as the wheel spins the ball bounces around until landing one of the thirty-six black and red numbered compartments on European-style wheels; on American tables an extra green division marked “00” is also present.

A croupier will then announce and pay out the winning number and pay out any player bets placed. Any remaining bets, which had been arranged in groups on the table, will then be repositioned by the dealer and a new betting cycle begins. There is an array of bets available in Roulette from single number bets to groupings such as red/black (19-36), with odds displayed on a betting board for all possible bets.