http - Angularjs $httpd assign variable onSuccess to $scope empty -

i have controller:

.controller('mycontroller', ['$scope','$http', function ($scope,$http,) {      $scope.saveit = function () {         $scope.key = '';         $http.get('/gethash',{"key": $scope.key})         .success(function(response, status, headers, config){             $scope.key = response.key;         });     }      console.log ($scope.key) // key empty } 

why @ end $scope.key empty?

it won't set until call saveit(), won't have done yet when log statement executed. you've defined function sets key, haven't invoked it.