angularJs:AditionProb

HTML

<div ng-app="" ng-controller="MyController">
    <br/>{{update(0)}}
    <br/>{{update(10)}}
    <br/>{{update(50)}}
    <br/>{{update(-60)}}
</div>

JavaScript

function MyController($scope){
    var x=parseInt(00);
    $scope.update = function(smValue){
        x += parseInt(smValue);
        return x;
    }
}