Wait I don't get in. What is scope and return ?

class Main {

  private String classScope = "I am available through this class";

  private String returnSomething(){
    String x = "a string - thus object type"; //x can only reference in this method,
    return x;
  }

  public void run() {
      System.out.println(classScope);
      String functionScope = "I am available through this function";
      System.out.println(functionScope);
      if(true){
        System.out.println(classScope);
        System.out.println(functionScope);
        String ifScope = "I exist inside my enclosing {}";
        System.out.println(ifScope);
      }
      //System.out.println(ifScope); //ifScope doesn't exist here.
      System.out.println(returnSomething());
  }
  public static void main(String[] args){
    Main m = new Main();
    m.run();
  }
}