What is the difference between adding (or not) an array in the parameter definition of a controller in AngularJS?

To pass data from the controllerto viewin AngularJS we use the following:

Angular Scope

var x = angular.module("myApp",[]);
x.controller('myController',function($scope) {
    $scope.var1 = "valor1";
    $scope.varN = "valorN";
});

Receiving only the values ​​contained within the scope $scope.

In the official documentation of AngularJS(appendix at the end) referencing the service $window(global JavaScript object), they use the following configuration:

Angular + Javascript(Window) scope

var myApp = angular.module('myApp', []);
x.controller('myController', ['$scope', '$window', function($scope, $window) {
      $scope.var1 = "var1";
      $scope.varN = "varN";
      $scope.var1JS = $window.var1JS;
      $scope.var2JS = $window.var2JS;
  }]);

Receiving values ​​from the scopes $scopeand $window.

Why do you use an array with the two scopes ( $scope, $window) in addition to the default function in the parameters of the controller, if it is possible that it works only by passing the parameter $windowin an additional way?, like this:

let myApp = angular.module("myApp",[]);
myApp.controller("myController",function($scope,$window) {
    $scope.var1 = "valor1";
    $scope.varN = "valorN";
    $scope.var1Js=$window.var1Js;
    $scope.var2Js=$window.var2Js;
});

Assuming from the first method that if the controller recognizes the service $scopeby default, you could do it with $window.

Addendum: https://docs.angularjs.org/api/ng/service/ $window