Roullete, also known as Roulette, is a casino game based on luck in which players place bets on the number or grouping of numbers that will come up when the roulette wheel stops spinning. It is one of the most popular games at online and land-based casinos. It is a classic gambling game and has many variations.

There are a variety of bets a player can make in roulette including inside and outside bets. Inside bets are placed on a specific number or a range of numbers based on their position on the layout. Outside bets are placed on various positional groupings of pockets and can be odd or even, red or black. There is also a high or low bet, which is similar to the odd or even bet but is wagering that the winning number will be either one of the first 18 numbers on the layout (1-18) or one of the last 18 numbers (19-36). The house gets its edge in this type of bet because the numbers 0 and 00 are not considered odd or even and if one of them comes up, all outside bets lose.

Roulette was invented in the 17th century by French mathematician Blaise Pascal and gained popularity throughout Europe and eventually made its way to America. Despite its popularity and widespread use in European gaming houses, the game was banned in the United States during the 1860s because of rampant cheating. After a brief ban, the game was modified to prevent devices from being hidden in the wheel or table and it evolved into its current form.