ng-init为变量设置初始值，只要在ng-app范围内，对任何一其定义的变量均有效；其方式为ng-init="变量名称=‘变量值’"；注意外边双引号，初始值要用单引号：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script src="angular.js"></script>
</head>
<body >
<div ng-app=""ng-init="gender='male'">
<h1>ng-init="arr='xxx'"初始值定义</h1>
<h2>{{gender}}</h2>
</div>
</body>
</html>
显示效果为下图：
