Angular: Empty Fiddle

http://angularjs.org/

HTML

<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
    {{validNumber}}
    <form>
        <input 
            type="number"
            ng-model="validNumber"
            required
            min="10"
            max="20" 
        />
    </form>
</div>

JavaScript

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

function MyCtrl($scope) {
    $scope.validNumber = 15;
}