Angularjs Uncaught Error: [$injector:modulerr] when migrating to V1.3

Question

I am learning Angular.js and I am not able to figure out whats wrong with this simple code. It seems to look fine but giving me following error.

Answer 1

You have to define your controller

var app = angular.module('app', []);

app.controller('Ctrl', ['$scope',function($scope) {
  $scope.age = 24;
}]);