See here for the ranking of various poker hands.

The values of individual cards in ascending order is: 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K, A

Also use the value of the individual cards to determine the winner among players with same type of hand.

  • High card

If no combination can be made, then a player's hand is valued at the highest single card. If two players have the same high card, then the second highest card would break the tie.

Example: 5♣ 8♦ 10♠ Q♥ K♠

  • One Pair

A pair is formed when you have two of any of the same cards.

Example: 9♠ 9♦ 5♣ 8♣ K♥

  • Two Pairs

You have a pair, and you also have another pair.

Example: 9♠ 9♦ 5♣ 5♥ 8♥

  • Three of a Kind

Example: 9♠ 9♦ 9♥ 5♣ 8♣

  • Straight

A straight is a five-card hand consisting of a running sequence of cards, regardless of suit.
Example: 9♠ 10♠ J♦ Q♥ K♦

  • Flush

When all five cards in a hand are of the same suit, it is a flush.
Example: 9♠ 5♠ Q♠ K♠ 7♠

  • Full House

When a player has three-of-a-kind and a pair in the same hand, it is called a Full House.
Example: 9♠ 9♦ 9♥ 5♣ 5♥

  • Four of a Kind

If you are lucky enough to have all four of a given number, then you have a very powerful hand.
Example: 9♠ 9♦ 9♥ 9♣ 5♣

  • Straight Flush

Even rarer than four of a kind, a straight flush is made up of five consecutive cards, all from the same suit.
Example: 9♠ 10♠ J♠ Q♠ K♠

  • Royal Flush

The best hand of them all. The hand is formed by a Straight Flush that runs to the Ace, making it unbeatable. The odds of getting this hand can be as high as 1 in 650,000 deals.
Example: 10♥ J♥ Q♥ K♥ A♥