Roullete is a casino game played on a circular table with a numbered wheel. The game is popular worldwide and can be found in land-based casinos and online. The game has several variants, each with subtle differences that can make a difference to your bankroll.

The Roulette wheel consists of a solid wooden disk slightly convex in shape with a number of metal partitions, or frets, around its rim. Thirty-six of these compartments, painted alternately red and black, are numbered nonconsecutively from 1 to 36. The roulette wheel also has two green compartments labeled with the corresponding symbols (0 and 00).

Players bet on the numbers or various groupings of pockets based on their position on the table (known as the layout). Bets placed on a specific section of the table are known as inside bets, while those on the outside are called outside bets. Each type of bet offers different payout odds, based on its probability of being successful.

Various theories exist about the origins of the game, including that it was invented by 17th-century French mathematician Blaise Pascal and by Dominican monks. Its current form was developed in the late 1700s. Roulette became a key game in the gambling houses of Europe, and later spread to America. It was banned in France from 1836 to 1933. Attempts to beat the house edge through betting systems have been unsuccessful.