---
id: 5900f3851000cf542c50fe98
challengeType: 5
title: 'Problem 25: 1000-digit Fibonacci number'
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert.strictEqual(digitFibonacci(5), 21, "<code>digitFibonacci(5)</code> should return 21.");'
  - text: ''
    testString: 'assert.strictEqual(digitFibonacci(10), 45, "<code>digitFibonacci(10)</code> should return 45.");'
  - text: ''
    testString: 'assert.strictEqual(digitFibonacci(15), 69, "<code>digitFibonacci(15)</code> should return 69.");'
  - text: ''
    testString: 'assert.strictEqual(digitFibonacci(20), 93, "<code>digitFibonacci(20)</code> should return 93.");'

```

</section>

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

<div id='js-seed'>

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

digitFibonacci(20);

```

</div>



</section>

## Solution
<section id='solution'>

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