AngularJS - Expressions

Expressions are used to bind application data to html. Expressions are written inside double braces like {{ expression}}. Expressions behaves in same way as ng-bind directives. AngularJS application expressions are pure javascript expressions and outputs the data where they are used.

Using numbers

<p>Expense on Books : {{cost * quantity}} Rs</p>

Using strings

<p>Hello {{student.firstname + " " + student.lastname}}!</p>

Using object

<p>Roll No: {{student.rollno}}</p>

Using array

<p>Marks(Math): {{marks[3]}}</p>

Example

Following example will showcase all the above mentioned expressions.

testAngularJS.htm

<html>

  

   <head>

      <title>AngularJS Expressions</title>

   </head>

  

   <body>

      <h1>Sample Application</h1>

     

      <div ng-app = "" ng-init = "quantity = 1;cost = 30; student = {firstname:'Mahesh',lastname:'Parashar',rollno:101};marks = [80,90,75,73,60]">

         <p>Hello {{student.firstname + " " + student.lastname}}!</p>

         <p>Expense on Books : {{cost * quantity}} Rs</p>

         <p>Roll No: {{student.rollno}}</p>

         <p>Marks(Math): {{marks[3]}}</p>

      </div>

     

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

     

   </body>

</html>