---
title: Hailstone sequence
id: 595608ff8bcd7a50bd490181
challengeType: 5
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert(typeof hailstoneSequence === "function", "<code>hailstoneSequence</code> is a function.");'
  - text: ''
    testString: 'assert.deepEqual(hailstoneSequence(), res, "<code>hailstoneSequence()</code> should return <code>[[27,82,41,124,8,4,2,1], [351, 77031]]</code>");'

```

</section>

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

<div id='js-seed'>

```js
// noprotect
function hailstoneSequence () {
  const res = [];
  // Good luck!

  return res;
}

```

</div>


### After Test
<div id='js-teardown'>

```js
console.info('after the test');
```

</div>

</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>