Whenever you want to use angular expression, just use ng-app attribute with that specific tag (html, div, form etc.)
<html> <head>
<script type="text/javascript" src="angular.min.js"> </script>
<link rel="stylesheet" type="text/css" href="bootstrap.min.css">
</head> <body>
<div ng-app>
10+20 = {{ 10 + 20 }}
<br>
{{ 1 == 2 }}
<br>
{{ {name: 'Shaan', age: '30'}.name }}
<br>
{{ ['Shaan', 'Rahul', 'Sattu'][2] }}
</div> </body>
Output
10+20 = 30
false
Shaan
Sattu
In order to use AngularJS in whole of the page, you can use ng-app with html tag.
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