Basketball leagues are organized competitions where teams play against each other in the sport of basketball. These leagues can vary in level, from amateur to professional, and often have a structured schedule of games throughout a season. Teams earn points based on their performance, and the best teams may qualify for playoffs or championships at the end of the season. There are several well-known basketball leagues around the world, including the National Basketball Association (NBA) in the United States and the EuroLeague in Europe. Each league has its own set of rules, team structures, and fan bases, contributing to the global popularity of the sport.