Q:

HTML not importing Angular.js functions

I am using an HTML page to call functions from an Angular.js page using $scope. No matter what i do, my result appears as {{heading + message}} instead of Hello (+) Users name. (see code below). I feel like this is an issue with not being able to call from my js file, or simply not being able to call the Angular library. 
I tested out an example from the Angular.js website and it worked fine so i assume it cannot call the file. I have tried relative paths and direct paths, but neither seem to work for calling the first.js file.
Could it be a problem with not running a node.js server?
Here is the HTML and JS code (my code works perfectly on Stackflow's tester but not on my computer)

var firstApp = angular.module('firstApp', []);
firstApp.controller('FirstController', function($scope) {
 $scope.first = 'Some';
 $scope.last = 'One';
 $scope.heading = 'Message: ';
 $scope.updateMessage = function() {
  $scope.message = 'Hello ' + $scope.first +' '+ $scope.last + '!';
 };
});
<!doctype html>
<html>
 <head>
  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular.js"></script>
  <script scr="C:\Users\Administrator\Documents\AngularTesting\js\first.js"></script>
  <title>Name App</title>
 </head>
 <body ng-app="firstApp">
  <div ng-controller="FirstController">
   <span>Name:</span>
   <input type="text" ng-model="first">
   <input type="text" ng-model="last">
   <button ng-click='updateMessage()'>Message</button>
   <hr>
   {{heading + message}}
  </div>
  <!--<script scr="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular.min.js"></script>-->

 </body>
</html>

A:

AngularJS doesn't do its job if you don't run it on a server.
If you're not familiar with running a webpage on a server, follow these steps:

Download WampServer
Start running WampServer
Copy your files to the following folder: "C:\wamp\www\"
Change the "src" of your script file in your HTML page to the new location.
Open up a browser and go to http://localhost/app.html (assuming your HTML-file is called app.html)

AngularJS will now be able to do its job, just like on StackOverflow.

