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@ngdoc overview
@name Cookbook: Hello World
@description
<doc:example>
<doc:source>
<script>
function HelloCntl($scope) {
$scope.name = 'World';
}
</script>
<div ng-controller="HelloCntl">
Your name: <input type="text" ng-model="name"/>
<hr/>
Hello {{name || "World"}}!
</div>
</doc:source>
<doc:scenario>
it('should change the binding when user enters text', function() {
expect(binding('name')).toEqual('World');
input('name').enter('angular');
expect(binding('name')).toEqual('angular');
});
</doc:scenario>
</doc:example>
# Things to notice
Take a look through the source and note:
* The script tag that {@link guide/bootstrap bootstraps} the Angular environment.
* The text {@link api/ng.directive:input input form control} which is
bound to the greeting name text.
* There is no need for listener registration and event firing on change events.
* The implicit presence of the `name` variable which is in the root {@link api/ng.$rootScope.Scope scope}.
* The double curly brace `{{markup}}`, which binds the name variable to the greeting text.
* The concept of {@link guide/databinding data binding}, which reflects any
changes to the
input field in the greeting text.
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