打卡第一天-2-质数

[Devoted(备赛ing)]

 
import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
 
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
      int n = 2;
      int count = 0;
      while(true){
        if(isPrime(n)){
          count++;
        }
 
        if(count==2019){
          break;
      }
      n++;
      }
      System.out.println(n);
        scan.close();
    }
    public static boolean isPrime(int m){
      for(int i = 2;i<=Math.sqrt(m);i++){
        if(m%i==0){
          return false;
        }
      }
      return true;
    }
}