AngularJS: Error: $ q not defined

Question

I want to make a promise in my angularjs controller. I took an example from the Angularjs Doc and pasted it into my controller. When I try to run the code, the console prints:

Error: $q is not defined

Why does this error occur and how to solve it?

I tried to solve this problem, but most of the questions relate to more specific problems than mine.

A (German) tells me that promises is already implemented in angular js and there is no need to add anything to it.

EDIT:

this is my controller:

app.controller("ArgumentationController", [
    '$scope', '$resource',
    function($scope, $resource) {

EDIT2: Comment suggested entering $ q. I have done this:

app.controller("ArgumentationController", [
    '$scope', '$resource', '$q',
    function($scope, $resource, $q) {

Now the error does not occur.

Answer 1

$resource . $q . , $q, .

 app.controller("ArgumentationController", [
        '$scope', '$q',
        function($scope, $q) {