Mostly used under ng-repeat
ngValue is useful when dynamically generating lists of radio buttons using ngRepeat
<script>
angular.module('valueExample', [])
.controller('ExampleController', ['$scope', function($scope) {
$scope.names = ['pizza', 'unicorns', 'robots'];
$scope.my = { favorite: 'unicorns' };
}]);
</script>
<form ng-controller="ExampleController">
<h2>Which is your favorite?</h2>
<label ng-repeat="name in names" for="{{name}}">
{{name}}
<input type="radio"
ng-model="my.favorite"
ng-value="name"
id="{{name}}"
name="favorite">
</label>
<div>You chose {{my.favorite}}</div>
</form>