angular2js: Uncaught Reference Error: System is not defined

Question

I am new to angular so please help. I am getting an error while trying to run a simple code with angular with angular ng-controller tag where I am

Answer 1

Using https://cdnjs.cloudflare.com/ajax/libs/angular.js/2.0.0-beta.7/angular2-all.umd.js helped to remove this error. No external system js needed.