freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/find-the-longest-word-in-a-string.english.md

---
id: a26cbbe9ad8655a977e1ceb5
title: Find the Longest Word in a String
isRequired: true
challengeType: 5
---

## Description
<section id='description'>
Return the length of the longest word in the provided sentence.
Your response should be a number.
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return a number.
    testString: 'assert(typeof findLongestWordLength("The quick brown fox jumped over the lazy dog") === "number", "<code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return a number.");'
  - text: <code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return 6.
    testString: 'assert(findLongestWordLength("The quick brown fox jumped over the lazy dog") === 6, "<code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return 6.");'
  - text: <code>findLongestWordLength("May the force be with you")</code> should return 5.
    testString: 'assert(findLongestWordLength("May the force be with you") === 5, "<code>findLongestWordLength("May the force be with you")</code> should return 5.");'
  - text: <code>findLongestWordLength("Google do a barrel roll")</code> should return 6.
    testString: 'assert(findLongestWordLength("Google do a barrel roll") === 6, "<code>findLongestWordLength("Google do a barrel roll")</code> should return 6.");'
  - text: <code>findLongestWordLength("What is the average airspeed velocity of an unladen swallow")</code> should return 8.
    testString: 'assert(findLongestWordLength("What is the average airspeed velocity of an unladen swallow") === 8, "<code>findLongestWordLength("What is the average airspeed velocity of an unladen swallow")</code> should return 8.");'
  - text: <code>findLongestWordLength("What if we try a super-long word such as otorhinolaryngology")</code> should return 19.
    testString: 'assert(findLongestWordLength("What if we try a super-long word such as otorhinolaryngology") === 19, "<code>findLongestWordLength("What if we try a super-long word such as otorhinolaryngology")</code> should return 19.");'

```

</section>

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

<div id='js-seed'>

```js
function findLongestWordLength(str) {
  return str.length;
}

findLongestWordLength("The quick brown fox jumped over the lazy dog");
```

</div>



</section>

## Solution
<section id='solution'>


```js
function findLongestWordLength(str) {
  return str.split(' ').sort((a, b) => b.length - a.length)[0].length;
}

findLongestWordLength("The quick brown fox jumped over the lazy dog");

```

</section>