Find the Longest Word in a String - why is array[i] undefined?

JavaScript
1

Tell us what’s happening:
I have been trying to research why does the result shows the error that array[i] is undefined, but haven’t found any answers. I think that my code is not working because of something about the scope of the variables, but I cannot seem to find the solution. Would anyone be kind enough to point me in the right direction?
Thanks!

Your code so far

function findLongestWord(str) {
  var array = str.split(" ");
  var longest = array[0];
  for (var i = 1; i <= array.length; i++) {
    if (array[i].length >= longest.length) {
      longest = array[i];
    }
  }
  return longest.lenght;
}

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

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0.

Link to the challenge:
https://www.freecodecamp.org/challenges/find-the-longest-word-in-a-string

2

Recall that indexing starts at 0. What does that make the index for the last element in an array?

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