A deck consists of 52 cards. These cards are divided into four suits, each of which contains 13 ranks.

The Four Suits

The suits are all of equal value. That is to say, no suit is higher than any other suit.

The Thirteen Ranks
In poker, the Ace is the highest card and the 2 (Deuce) is the lowest. However, the Ace can be used as a low card to form the straight 5432A.