Дело по умолчанию в Java-Click-Case

class Main {
  public static void main(String[] args) {
      int expression = 9;
        switch(expression) {
        
      case 2:
        System.out.println("Small Size");
        break;

      case 3:
        System.out.println("Large Size");
        break;
            
      // default case
      default:
        System.out.println("Unknown Size");
    }
  }
}
SAMER SAEID