location undefine when i convert lat&long to adderss format

var location;
var point = new google.maps.LatLng(data[key].latitude, data[key].longitude);
var geocoder = new google.maps.Geocoder();
geocoder.geocode({latLng: point},function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[0]) {
location = results[0].formatted_address;
}
}