Blackjack is a card game, traditionally played in casinos, that pits Player v. Dealer. The goal of the game is to get as close to 21 as possible without going over, which is reffered to as busting.
During the player's turn, they have two options: Hit or Stand. If a player chooses to Hit, the dealer gives them another card. If a player chooses to Stand, the complete their turn, passing play to the player clockwise of them or to the dealer.
The dealer's moves are automatic, as they always hit if their cards add up to less than 17 or stand if they do. In the end, each player is evaluated to see if they win, lose, or tie, called a push.
Cards with a number rank (shown in the top-left corner typically) are evaluated to their rank, face cards (kings, queens, jacks) are evaluated as 10, and aces are either 1 or 11, whicher is more advantageous to the player.
The winner is determined like this:
Has the player busted?
Has the dealer busted?
Compare the scores.