package Studytest;

public class Prog2 {

    public static void main(String[] args){

         int start=101;

         int end=201;

         int count=0;

         for (int i=start;i<=end;i++)

         {

             if(isPrime(i)) {

                 count++;

                 System.out.print(i + " ");

                 if (count % 10 == 0) {

                     System.out.println();

                 }

             }

         }

        System.out.println();

        System.out.println("素数的个数为"+count);

    }

//判断是否是素数

  private static boolean isPrime(int n) {

    boolean flag=true;

      if(n==1)

      {

          flag=false;

      }

      if(n>1)

      {

          for(int i=2;i<=Math.sqrt(n);i++)

          {

              if((n%i)==0)

              {

                  flag=false;

                  break;

              }else {

                  flag=true;

              }

          }

      }

    return flag;

  }

}