4-3逻辑非运算符及案例 & 4-4

创建类

LoginDemo3

这里取反

!(n%3==0)

package com.imooc.operator;
import java.util.Scanner;

public class LoginDemo3 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("请输入一个整数");
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        //能否被3整除 就是对3取余
        if(!(n%3==0)){
            System.out.println(n+"不能被3整数！");
        }else{
            System.out.println(n+"能被3整数！");
        }

    }

}

4-3