שלוש ספרות קפולות של7 dowhile

import java.util.Scanner;

public class Dowhile2 {
    public static void main(String[] args) {
        Scanner s=new Scanner(System.in);
        int num;
        do {
            System.out.println("please give me a number");
            num=s.nextInt();
        }while (!(num>=100&&num<=999&&num%7==0));
        System.out.println(num);
    }
}