For which types of classes is the 'final' keyword intended?

The keyword final in iOS (Swift) is used for classes, methods, or properties that cannot be overridden or inherited. If a class is declared as final, it cannot be subclassed. This helps improve safety and performance, as the compiler knows that the class will not be modified.

Example:

final class MyClass {
    func doSomething() {
        print("Hello")
    }
}

// Attempting to inherit will cause an error
// class SubClass: MyClass {} // Error