Poker - Game Play

In casual play, the right to deal a hand typically rotates among the players and is marked by a token called a 'dealer' button (or "buck"). In a casino, a house dealer handles the cards for each hand, but the button (typically a white plastic disk) is rotated clockwise among the players to indicate a nominal dealer to determine the order of betting.

One or more players are required to make forced bets to create an initial stake for which the players will contest. The dealer shuffles the cards, cuts, and deals the appropriate number of cards to the players one at a time. Cards may be dealt either face-up or face-down, depending on the variant of poker being played. After the initial deal, the first of what may be several betting rounds begins. Between rounds, the players' hands develop in some way, often by being dealt additional cards or replacing cards previously dealt. At the end of each round, all bets are gathered into the central pot.

At any time during a betting round, if a player makes a bet, opponents are required to fold, call or raise. If one player bets and no opponents choose to call (match) the bet, the hand ends immediately, the bettor is awarded the pot, no cards are required to be shown, and the next hand begins. This possibility of winning a pot without showing a hand makes bluffing possible. Bluffing is a primary feature of poker, one that distinguishes it from other vying games and from other games that make use of poker hand rankings.

At the end of the last betting round, if more than one player remains, there is a showdown, in which the players reveal their previously hidden cards and evaluate their hands. The player with the best hand according to the poker variant being played wins the pot.

The most popular poker variants are as follows:

Draw Poker
Players each receive five — as in five-card draw — or more cards, all of which are hidden. They can then replace one or more of these cards a certain number of times.

Stud Poker
Players receive cards one at a time, some being displayed to other players at the table. The key difference between stud and 'draw' poker is that players are not allowed to discard or replace any cards.

Community Card Poker
Players combine individually dealt cards with a number of "community cards" dealt face up and shared by all players. Each player will attempt to make the best five card poker hand using the community cards and their own face down cards. Two or four individual cards may be dealt in the most popular variations, Texas hold 'em and Omaha hold 'em, respectively.

From Wikipedia's