题解 | #判断质数#

import java.util.Scanner;
//哈哈哈哈哈这道题给我笑麻了，写完之后发现样例一个都没过，看了好久，发现是判断质数，是质数输出true，我给写成判断合数了......小伙伴们一定要细心呀~
public class Main {
    public static void main(String[] args) {
        Main main = new Main();
        Scanner scan = new Scanner(System.in);
        int number = scan.nextInt();
        System.out.println(main.isPrimeNumber(number));
    }

    public Boolean isPrimeNumber(int number) {

        //write your code here......
        int flag = 0;
        if(number == 2) return true;
        else if(number ==3) return true;
        else{
            for(int i = 2; i <= number / 2; i++){
            if(number % i == 0){
                flag = 1;
                break;
            }
        }
        }
        if(flag == 1) return false;
        else return true;

    }
}