javascript - $index inside ng-click not print a number -

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i create ng-click inside ng-repeat , want change variable currentpage $index value. not work properly, $index print string not return number. code: 

<li ng-repeat="i in getnumber(pagenumber) track $index">     <a href="#" ng-click="currentpage=$index">{{$index+1}}</a> </li>

update: want write ng-click statement inline in html, not call function in controller.

use function setcurrentpage :

<li ng-repeat="i in getnumber(pagenumber) track $index">     <a href="#" ng-click="setcurrentpage($index)">{{$index+1}}</a> </li>

in controller :

$scope.setcurrentpage = function (index) {     $scope.currentpage = index; }

note: index number, no need conversion.


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