Craps is a dice game played against other players or a bank. Craps developed from a simplification of the Old English game hazard. Its origins are complex and may date to the Crusades, later being influenced by French gamblers. What was to become the modern American version of the game was brought to New Orleans by Bernard Xavier Philippe de Marigny de Mandeville, scion of wealthy Louisiana landowners and a gambler and politician. The game, first known as crapaud (a French word meaning "toad") reportedly owes its modern popularity from its being spread through the African-American community .

In craps, players may wager money against each other (street craps) or the bank (bank craps) on the outcome of one roll, or of a series of rolls of two dice. Because it requires very little equipment, craps can easily be played in less formal settings, and is said to be popular among soldiers. In such situations side bets are more frequent, with one or several participants covering or "fading" bets against the dice.

The rules of play against a bank or casino

Bank craps is a game played by one or more players against a casino. The casino covers all player bets at a table and sets the odds on its payout. Players take turns rolling two dice. The player rolling the dice is called the "shooter." Other players at the table will make bets on the shooter's dice rolls. The game is played in rounds, with the first roll of a new round called the "come-out roll". The second round resolves with a point being rolled or a seven.

To begin, a player wishing to play as the shooter must bet the table minimum on either the "Pass" line or the "Don't Pass" line (pass and don't pass are sometimes called “Win” and “Don't Win” bets for the outcome of a shooter's round). A player next in turn to become shooter may refuse the dice, but may still play; the dice then pass to the next willing player in turn. The shooter is then presented five dice by the stickman, and must choose two to roll with. The remaining dice are returned to the stickman's bowl and are not used. The shooter then makes a "come-out roll" with the intention of establishing a point. If the shooter's come-out roll is a 2, 3 or 12, it is called "craps"; the round ends with players losing their pass line bets, and the dice pass to the next shooter. A come-out roll of 7 or 11 is called a "natural," resulting in a win for pass line bets (and a loss for don't pass bets) and the shooter retains the dice. Either way, the come-out roll continues until a point is established. If the numbers 4, 5, 6, 8, 9, or 10 are rolled on the come-out, this number becomes the "point" and the come out roll is now over. The dealers will move an "On" button (or puck) to the point number which identifies the point number to all players at the table. The shooter will now continue rolling until either the point is rolled or a seven. If the shooter is successful in rolling the point, the result is a win for the pass line (and a loss for the don't pass). If the shooter rolls a seven (called a "seven-out"), the pass line loses (and the don't pass wins). A seven-out ends the round with the dice being passed (clockwise) to the next player who wishes to become the new shooter.