public class Test {

    public static void main(String[] args) {
        Test ob=new Test();
        ob.fn();
        
   
    }
     void fn()
    {
        int a,i;
        int c=0;
        for(a=100;a<=300;a++)
        {
            for(i=2;i<a;i++)
            {
                if(a%i==0)
                {   
                    c=1;
                    break;
                }
            }
            if(c==0)
            {
                System.out.println(a+"是一个质数");
            }
            
        }
        
    }
}