java实现简单的素数判断

import java.util.Scanner;

public class test1 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);	
		int i=2;
		int n=0;
		System.out.println("请输入一个数:");
		n=sc.nextInt(); 
		while (i<=n) {
			if(n%i==0){	
				break;				
			}
			i++;
	
		}
		if(i==n){
			System.out.println("是素数");
		}else{
			System.out.println("不是素数");
		}
		
		
		
	}

}