Javascript Array get third greatest

function thirdGreates(arr){

  arr = arr.sort();/* ww  w. j a  v a 2 s.  c  o m*/
  //console.log(arr);

  for(var i = 0; i < arr.length; i++){
       return arr[arr.length - 3]
 }
}
console.log(thirdGreates([5, 3, 7]));
console.log(thirdGreates([5, 3, 7, 4]));
console.log(thirdGreates([2, 3, 7, 4]));

function ThirdGreatest(strArr) {

  var sorted = strArr.sort(function(a, b){
    return b.length - a.length;
  });
  //console.log(sorted);
  return sorted[2];

}
console.log(ThirdGreatest(["coder","fyte","code"]));  
console.log(ThirdGreatest(["abc","defg","aaa","ddd"]));  
console.log(ThirdGreatest(["hello", "world", "after", "all"]));