1.引入
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
ng-init:初始化数据
<div ng-app='' ng-init='a=2;b=5;quantity="许嵩";cost="Vae";arr=[1,2,3,4,5]'>
<p>{{a+b}}</p>
<p>{{quantity +''+cost}}</p>
<span ng-bind='arr[3]'></span>
</div>