French roulette rules
The French roulette name a version of the European roulette where in case of loss of a zero, to the player half of bet comes back to equal odds. In the original, in case of loss of a zero, on bets on equal odds the special chesspiece was put, and bet appeared « in prison ». These bets played following round, and the player could win or lose for them. In online of a casino now simply return half of bets in case of loss of a zero, and can make it as on the European table (the French roulette), and on American.
Advantage of a casino in the American roulette is 1,35 %.