Filters are used for formatting data displayed to the user.
The general syntax in templates is as follows:
{{ expression [| filter_name[:parameter_value] ... ] }}
$filter(name);
| Param | Type | Details | 
|---|---|---|
| name | String | Name of the filter function to retrieve | 
| Function | the filter function | 
<div ng-controller="MainCtrl">
 <h3>{{ originalText }}</h3>
 <h3>{{ filteredText }}</h3>
</div>angular.module('filterExample', [])
.controller('MainCtrl', function($scope, $filter) {
  $scope.originalText = 'hello';
  $scope.filteredText = $filter('uppercase')($scope.originalText);
});