本人学生请求解答这个语言

import java.util.Scanner;
class Main {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
while (scan.hasNextInt()) {
int a = scan.nextInt();
int b = scan.nextInt();
int result = add(a,b);
System.out.println(result);
}
scan.close();
}
public static int add(int a, int b) {System.out.println("a+b");
// TODO: 请在此编写代码
}
}

A+B怎么解

return a+b;