function findLongestWord(str) {
 var array=str.split(" "); 
 var newArray=[]; 
 for(var i=0;i<array.length;i++){ 
    newArray.push(array[i].length); 
 }
 function word (a,b){
   return b-a;
 }
  var last = newArray.sort(word);
 return last[0];

}

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