What is the difference between these two controller declarations?

Could someone please explain what is the difference between the two declarations below?

angular.module(‘starter’)
.controller(‘TwitterController’, [’$scope’, ‘TwitterService’, function($scope, TwitterService){

angular.module(‘starter’)
.controller(‘LocationController’, function($scope, LocationService){

Its two of several ways to use angulars dependency injection. The first is inline array annotation which will help when minifying your code.

http://anandmanisankar.com/posts/angularjs-dependency-injection-demystified/