FCC BAS #6 - Bonfire: Find the Longest Word in a String

function findLongestWord(str) {
  str = str.split(" ");
  var long = 0;
  for(x=0; x<str.length; x++) {
    if(str[x].length > long) {
        long = str[x].length;
    }
  } return long;
}

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