Angular: Empty Fiddle

http://angularjs.org/

by Ananya Ojha

HTML

<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
  Hello, {{sum}}!
</div>

JavaScript

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

//myApp.directive('myDirective', function() {});
//myApp.factory('myService', function() {});

function MyCtrl($scope) {
    $scope.sum = 0;
    $scope.Var_1 = 1 ;
    $scope.Var_2 = 2 ;
    $scope.Var_3 = 3 ;
    $scope.Var_4 = 4 ;

    $scope.Var_1_Flag = true ;
    $scope.Var_2_Flag = false;
    $scope.Var_3_Flag = false;
    $scope.Var_4_Flag = true ;
    
    $scope.sum = ($scope.Var_1_Flag ? $scope.Var_1 : 0) + ($scope.Var_2_Flag ? $scope.Var_2 : 0) + ($scope.Var_3_Flag ? $scope.Var_3 : 0) + ($scope.Var_4_Flag ? $scope.Var_4 : 0)
    
    console.log($scope.sum)
}