Edit in JSFiddle


              
      
      <script src = "http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>

      <h1>Sample Application</h1>
      
      <div ng-app = "" ng-init = "quantity = 1;cost = 30; student = {firstname:'Nopphanan',lastname:'Mayoe',rollno:301};marks = [80,90,75,73,60]">
         <p>Hello {{student.firstname + " " + student.lastname}}!</p>
         <p>Expense on Books : {{cost * quantity}} Bath</p>
         <p>Roll No: {{student.rollno}}</p>
         <p>Marks(Math): {{marks[3]}}</p>
      </div>