ng-app,ng-init

ng-app:

The ng-app directive initializes AngularJS and makes the specified element a root element of the application. Visit ng-app section for more information.

ng-init:

The ng-init directive can be used to initialize variables in AngularJS application.
We're using JSON syntax to define array of countries.
<div ng-app = "" ng-init = "countries = [{locale:'vuyyuru',name:'India'}, {locale:'vijayawada',name:'India'}, {locale:'hyd',name:'India'}]">  
   ...  
</div> 
The following example demonstrates ng-init directive that initializes variable of string, number, array, and object.
Practies example: ng-init.
<html >
<head>
<script src="angular.min.js"></script>
</head>
<body >
<h2>Ng-Init Sample Code:</h2>
<div ng-app ng-init="greet='Hello World!';
amount= 100;
myArr = [100, 200];
person = { firstName:'Vision', lastName :'Computes'}">
{{amount}}      <br />
{{myArr[1]}}    <br />
{{person.firstName}}
</div>
</body>
</html>

Note: variables in the above example cannot be used out of <div> element.

 

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