主题：程序代码——输出素数

public class Exec {
        public static void main(String args[]) {
                for (int i = 1; i <= 1000000; i += 2) {
                        boolean flag = true;

                        for (int j = 2; j < Math.sqrt(i); j++) {
                                if (i % j == 0) {
                                        flag = false;
                                        break;
                                }
                        }

                        if (flag)
                                System.out.println(i);
                }

        }
}