---
id: a26cbbe9ad8655a977e1ceb5
title: Find the Longest Word in a String
isRequired: true
challengeType: 5
---
## Description
Return the length of the longest word in the provided sentence.
Your response should be a number.
Remember to use Read-Search-Ask if you get stuck. Write your own code.
## Instructions
## Tests
```yml
tests:
- text: findLongestWordLength("The quick brown fox jumped over the lazy dog") should return a number.
testString: 'assert(typeof findLongestWordLength("The quick brown fox jumped over the lazy dog") === "number", "findLongestWordLength("The quick brown fox jumped over the lazy dog") should return a number.");'
- text: findLongestWordLength("The quick brown fox jumped over the lazy dog") should return 6.
testString: 'assert(findLongestWordLength("The quick brown fox jumped over the lazy dog") === 6, "findLongestWordLength("The quick brown fox jumped over the lazy dog") should return 6.");'
- text: findLongestWordLength("May the force be with you") should return 5.
testString: 'assert(findLongestWordLength("May the force be with you") === 5, "findLongestWordLength("May the force be with you") should return 5.");'
- text: findLongestWordLength("Google do a barrel roll") should return 6.
testString: 'assert(findLongestWordLength("Google do a barrel roll") === 6, "findLongestWordLength("Google do a barrel roll") should return 6.");'
- text: findLongestWordLength("What is the average airspeed velocity of an unladen swallow") should return 8.
testString: 'assert(findLongestWordLength("What is the average airspeed velocity of an unladen swallow") === 8, "findLongestWordLength("What is the average airspeed velocity of an unladen swallow") should return 8.");'
- text: findLongestWordLength("What if we try a super-long word such as otorhinolaryngology") should return 19.
testString: 'assert(findLongestWordLength("What if we try a super-long word such as otorhinolaryngology") === 19, "findLongestWordLength("What if we try a super-long word such as otorhinolaryngology") should return 19.");'
```
## Challenge Seed
```js
function findLongestWordLength(str) {
return str.length;
}
findLongestWordLength("The quick brown fox jumped over the lazy dog");
```
## 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");
```