ng-app directive defines and links an AngularJS application to HTML.
currency filter is applied to an expression using pipe character.
In AngularJS, Scope contains the model data.
There is a controller which takes single parameter. We call it . . . . . parameter.
The . . . . . . directive is one of the most fundamental directives in AngujarJS. The . . . . . directive inserts the result of an expression into the HTML template.