@jessicalab - There are a lot of different rules for different places. The court is designed differently for international basketball versus American basketball. Even here in America there are different rules. For example, in women’s college basketball there is no “10 second” rule. In the men’s game the players have 10 seconds to get the ball across half court, and if they don’t the ball is turned over to the other team. But in women’s ball they can take the entire shot clock to get the ball across the half court line. When you are used to watching men’s ball that can be unsettling.
Shot clocks for pro, international, college, men’s and women’s are all different as well.
There are also a lot of differences for youth basketball. While most people play with basketball goals that are 10’ high, younger players often play with 8’ or 9’ goals. They also have smaller basketballs. In fact women’s basketballs are smaller than men’s normal basketballs.