What is the difference between these two angularjs controller definition -

i don't understand difference between these 2 types of angularjs controller definition, have tried following codes , found both working

myapp.controller('greetingcontroller', ['$scope', function($scope) {   $scope.greeting = 'hola!'; }]);  myapp.controller('greetingcontroller', function($scope) {   $scope.greeting = 'hola!'; }); 

first 1 cares minification.

in controller:

myapp.controller('greetingcontroller', function($scope) {     $scope.greeting = 'hola!'; }); 

arguments minimized short values , dependency injection not work.

please at:

• https://docs.angularjs.org/guide/di#dependency-annotation
• https://docs.angularjs.org/tutorial/step_05
• what differences in angular controller notation?