Formats a number as a currency (ie $1,234.56). When no currency symbol is provided, default symbol for current locale is used.
{{ currency_expression | currency : symbol : fractionSize}}$filter('currency')(amount, symbol, fractionSize)| Param | Type | Details | 
|---|---|---|
| amount | number | Input to filter. | 
| symbol (optional) | string | Currency symbol or identifier to be displayed. | 
| fractionSize (optional) | number | Number of decimal places to round the amount to, defaults to default max fraction size for current locale | 
| string | Formatted number. | 
<script>
  angular.module('currencyExample', [])
    .controller('ExampleController', ['$scope', function($scope) {
      $scope.amount = 1234.56;
    }]);
</script>
<div ng-controller="ExampleController">
  <input type="number" ng-model="amount"> <br>
  default currency symbol ($): <span id="currency-default">{{amount | currency}}</span><br>
  custom currency identifier (USD$): <span id="currency-custom">{{amount | currency:"USD$"}}</span>
  no fractions (0): <span id="currency-no-fractions">{{amount | currency:"USD$":0}}</span>
</div>it('should init with 1234.56', function() {
  expect(element(by.id('currency-default')).getText()).toBe('$1,234.56');
  expect(element(by.id('currency-custom')).getText()).toBe('USD$1,234.56');
  expect(element(by.id('currency-no-fractions')).getText()).toBe('USD$1,235');
});
it('should update', function() {
  if (browser.params.browser == 'safari') {
    // Safari does not understand the minus key. See
    // https://github.com/angular/protractor/issues/481
    return;
  }
  element(by.model('amount')).clear();
  element(by.model('amount')).sendKeys('-1234');
  expect(element(by.id('currency-default')).getText()).toBe('($1,234.00)');
  expect(element(by.id('currency-custom')).getText()).toBe('(USD$1,234.00)');
  expect(element(by.id('currency-no-fractions')).getText()).toBe('(USD$1,234)');
});