This is one of the solutions to the Find the Longest Word in a String problem. I don’t understand why we use ‘longest’ in return statement since it seems to be doing nothing, I tried using only word.length and it still worked. Furthermore, why do we need Math.max since returning word.length alone will return the largest number anyway, I’m not sure how that works but it works. Can someone please clarify this?

```
function findLongestWordLength(s) {
return s.split(' ')
.reduce(function(longest, word) {
return Math.max(longest, word.length)
}, 0);
}```
```