求100之内的素数

public class Ex27 {
    public static void main(String args[])
    {
        int sum,i;
        for(sum=2;sum<=100;sum++)
        {
            for(i=2;i<=sum/2;i++)
            {
                if(sum%i==0)
                break;
            }
            if(i>sum/2)
            System.out.println(sum+"是素数");
        }
    }
}