Standard Deck Order in Card Games.

- In a standard 52 - card deck (excluding jokers), the cards are often grouped by suits. The four suits are hearts (♥), diamonds (♦), clubs (♣), and spades (♠).

- Within each suit, the cards are ordered from ace (A), 2, 3, 4, 5, 6, 7, 8, 9, 10, jack (J), queen (Q), king (K).

- So a typical order could be: Ace of hearts, 2 of hearts, 3 of hearts, …, King of hearts; then Ace of diamonds, 2 of diamonds, …; followed by Ace of clubs, etc.; and finally Ace of spades, 2 of spades, …, King of spades.

2、In Some Card Games like Poker (hand ranking order)

- High card: If no other hands are made, the highest - valued card in a player's hand determines the winner. The order of card values is as mentioned above (A > K > Q > J > 10 > 9 > 8 > 7 > 6 > 5 > 4 > 3 > 2).

- One pair: Two cards of the same rank. For example, two kings.

- Two pairs: Two sets of pairs.

- Three of a kind: Three cards of the same rank.

- Straight: Five consecutive cards in rank (e.g., 5 - 6 - 7 - 8 - 9). In some poker variants, ace can be used as either high (A - K - Q - J - 10) or low (A - 2 - 3 - 4 - 5).

- Flush: Five cards of the same suit.

- Full house: A combination of three of a kind and a pair (e.g., three queens and two fives).

- Four of a kind: Four cards of the same rank.

- Straight flush: Five consecutive cards of the same suit. The highest - ranking straight flush is the royal flush (10 - J - Q - K - A of the same suit).

3、In Card Sorting or Display Algorithms

- In computer programs dealing with cards, they might be stored in an array or list. The order could be based on a numerical encoding of the cards. For example, each card could be assigned a number: Ace = 1, 2 = 2, …, King = 13, and then the suits could be assigned numbers as well (hearts = 1, diamonds = 2, clubs = 3, spades = 4). So the Ace of hearts could be encoded as 1 * 13+1 = 14, and the order of cards in the data structure would be based on these numerical encodings.