Find longest word within a space separated sentence

findLongestWord.js

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