ReverseString_step3.js

var reverseString = function(stringToReverse) {
  var finalString = []; // I prefer to use arrays instead of strings.
  // loop through the string, starting at the end.
  for (var i = stringToReverse.length; i > 0; i--) {
    // push the character at the current index into the finalString array
    finalString.push(stringToReverse[i]);
  }
  // Join the characters in the array into a string and return the string.
  return finalString.join('');
}