ng-init Directive In AngularJs

<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>

<div ng-app="" ng-init="a=1;b=5">
<p>Total in dollar: {{ a+ b}}</p>
</div>

</body>
</html>