Poker has a universal set of rules used in both a casino and the typical casino online. The lowest value is a high card. If no players have any other hand, the winner is decided on the highest card, usually an ace. The scale goes to a pair, with the highest pair of cards winning. The next is three of a kind, providing three cards of the same value, with again the highest value winning.
The straight comes after the three of a kind in poker hand values. This occurs when a player gets five cards with values one after another; therefore 2, 3, 4, 5, 6 would be a straight. Straights use aces as high or low in hands of poker, so A, 2,3,4,5 counts as a straight as does 10, J, Q, K, A. A flush occurs when one player has five cards of the same suit, so five spades counts as a flush and beats a straight. A full house is the best known of winning poker hands, and occurs when a player has a three of a kind and a pair together.
The final three hands are quite rare. Four of a kind occurs when one has every card of any given value for example K, K, K, K and any other card. This can only beaten by the straight flush and royal flush. The straight flush consists of any straight where the cards are the same suit. A royal flush is also the same suit with the cards in the order 10, J, Q, K, A.