What is the best way to do loops in JavaScript

Question

I have stumbled into several methods of looping in JavaScript, what I like the most is:

for(var i = 0; i < a.length; i++){
    var element = a[i];
}
         


        

Answer 1

Just store the length in a variable first.

  var len = a.length;
  for (var i = 0; i < len; i++) {
    var element = a[i];
  }