Question

在看到上面的代码时，可以确定2个循环将打印它

将打印多少个循环我们如何确定它

Answer 1

您只需使用一个for循环打印两个模式：

        String pattern = "12345";
        int length = pattern.length();
        for (int i = 0; i < length; i++) {
            System.out.println(pattern);
            //remove the first char after every iteration
            pattern = pattern.substring(1);
        }
        System.out.println();
        pattern = "123456789";
        length = pattern.length();
        for (int i = 0; i < length; i++) {
            System.out.println(pattern);
            String lastchar = pattern.substring(length-1);
            String otherchars = pattern.substring(0, length-1);
            //append last char to front after every iteration
            pattern = lastchar.concat(otherchars);
        }

输出：

在嵌套循环中，在查看模式时，我们如何确定将打印多少个循环？

1 个答案: