How to use “>” comparator in angular ng-if statement

A fiddle to fork for doing AngularJS Fiddles. Version 1.0.5

HTML

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.0.5/angular.min.js"></script>
<div ng-controller="AppCtrl">
    <div ng-if="foo<0" class="bar"> FOO </div>
    <div ng-if="foo<0" class="bar"> BAZ </div>
</div>

JavaScript

var app = angular.module('app',[]);
function AppCtrl($scope) {
    $scope.foo = -3;
    $scope.baz = 3;
}