freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-28-number-spiral-diagonals.md

---
id: 5900f3881000cf542c50fe9b
challengeType: 5
videoUrl: ''
title: 问题28：对角螺旋数
---

## Description
<section id="description">
从数字1开始，沿顺时针方向向右移动，形成5 x 5螺旋，如下所示：
21 22 23 24 25
20 7 8 9 10
19 6 1 2 11
18 5 4 3 12
17 16 15 14 13
可以验证对角线上的数字之和为101。
以相同方式形成的n×n螺旋中的对角线上的数字的总和是多少？
</section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: '<code>spiralDiagonals(101)</code>应该返回692101。'
    testString: assert(spiralDiagonals(101) == 692101);
  - text: '<code>spiralDiagonals(101)</code>应该返回18591725。'
    testString: assert(spiralDiagonals(303) == 18591725);
  - text: '<code>spiralDiagonals(101)</code>应该返回85986601。'
    testString: assert(spiralDiagonals(505) == 85986601);
  - text: '<code>spiralDiagonals(101)</code>应该返回669171001。'
    testString: assert(spiralDiagonals(1001) == 669171001);

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function spiralDiagonals(n) {
  // Good luck!
  return n;
}

spiralDiagonals(1001);

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```

/section>