Javascript Data Type How to - Define looping condition array/object in syntax For loop

Question

We would like to know how to define looping condition array/object in syntax For loop.

Answer


<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'>
<!--from w ww.j a  va 2s  .co m-->
var allCars = ["opel" , "audi" , "volvo" , "volkswagen" , "renault"];
for (var i = 0, a; i < 3 && (a = allCars[i]); i++){
  document.writeln(a);
  document.writeln('<br/>');
}

</script>
</head>
<body>
</body>
</html>

The code above is rendered as follows: