What are the rules and strategies for playing the card game 21 points?

In the card game 21 points, players aim to reach a total of 21 points without going over. Each card has a value, with numbered cards worth their face value, face cards worth 10 points, and aces worth either 1 or 11 points. Players can choose to "hit" and draw another card or "stand" and keep their current total. Strategies include knowing when to hit or stand based on the cards you and the dealer have, and understanding the odds of going over 21. The player closest to 21 without going over wins.