AngularJS controller $scope reserved keyword? -

i newbie angular, came across this fiddle explains how nested controller works. when rename $scope else $abc , doesn't work, mean $scope reserved keyword in angularjs?

function carcontroller($scope) {      $scope.name = 'car';     $scope.type = 'car';  }  function bmwcontroller($scope) {      $scope.name = 'bmw';  }  function bmwmotorcyclecontroller($scope) {      $scope.name = 'bmwmotorade';     $scope.type = 'motorcycle';  } 

effectively, yes. it's not reserved word in sense e.g. if , while angularjs gives meaning. in example angular parses string representation of function , uses named parameters determine "inject" function when calls it.

in case you're injecting $scope service.