What are Built-in services in AngularJS?

Services in AngularJS are singleton functions/objects which can be used across the application, there are a set of build-in services which Angular provides which can be used for various functionalities, and apart from the pre-defined we can also define custom services and use them across the application.

The following are some of the commonly used built-in services in AngularJS

$scope

$rootScope

$http

$resource

$routeProvider

$document

$window

$sce