Q. Where do use unshift() method ?

जिस array के first element से पहले Single या multiple element insert या add करना हो , तब unshift method का use करते हैं

• 
  

  Example

  
  
  <script>

  var a = ["Apple", "Ball", "Cat", "Dog"];
   document.write("<b> Before Medhod : </b>" +  a+"</br>");
   a.unshift("Elephant")
   document.write("<b> After Medhod : </b>" +  a);
     

  </script>

  Out Put : Before Medhod : Apple,Ball,Cat,Dog
  After Medhod : Elephant,Apple,Ball,Cat,Dog