findLongestWord.js

function findLongestWord(str) {
  
  var charCount = 0;
  var strArray = str.split(' ');
  
  for(var i = 0;i < strArray.length ;i++)
  {
    if(strArray[i].length > charCount)
    {
      charCount = strArray[i].length;
    }
  }
  
  return(charCount);
  
}

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