用while循环一直计算两个随机数的和，直到输入错误答案

Question

import java.util.Scanner;

public class probelm2 {

  public static void main(String[] args) {

    Scanner scanner = new Scanner(System.in);

    int num1, num2;

    num1 = (int) (Math.random() * 10);

    num2 = (int) (Math.random() * 10);

    int result = num1 + num2;

    

      System.out.print("What is " + num1 + " + " + num2 + "? ");

       int answer = scanner.nextInt();

 

    while (answer == result) {

       System.out.print("What is " + ((int)(Math.random() * 10)) + " + " + ((int)(Math.random() * 10)) + "? ");

       answer = scanner.nextInt();

    }

    System.out.println("Sorry. That is incorrect");

  }

}