主题：程序代码——打印3到100内的素数

public class exec
{
   public static void main( String args[] )
   {
                for(int i=3;i<=100;i++,i++)
                {
                        boolean flag=true;
                        for(int j=2;j<=Math.sqrt(i);j++)                                                
                        {
                                if(i%j==0)
                                        flag=false;
                        }
                        if(flag)
                                System.out.println(i);                          
                }
        }
}