text: var app = angular.module('myApp',[]);
  
  app.controller('myCtrl',function($scope){
  	 $scope.a = 0;
       $scope.b = 0;
  	$scope.suma = function(){
  		$scope.a = $scope.a;
  		$scope.b = $scope.b;
  
  		$scope.c = $scope.a + $scope.b;
  	}
  });