How many classes are there in Team Fortress 2?

There are 9 classes in Team Fortress 2 because each class serves a unique role and offers a different playstyle and set of abilities. The game is designed to promote team-based gameplay and strategic diversity, hence the variety of classes ranging from offensive forces like the Scout, Soldier, and Pyro, to defensive ones like the Heavy, Engineer, and Sniper, as well as supportive classes such as the Medic and Spy. Having 9 classes allows for a dynamic and balanced gameplay experience, ensuring that players can find a class that suits their preferred playstyle while also encouraging team cooperation and strategy.