Loop from start time to end time and returns array of times [8:00AM, 8:30AM, 9:00AM, .....]

Time Loop.js

$scope.selectedInterval = 30;

$scope.updateTimeInterval = function()
{
    var startTime = 8;
    var endTime = 13;
    var tt = startTime*60; // start at 8am 
    var ap = ['AM', 'PM']; 

    //loop to increment the time and push results in array
    for (var i=0;tt<=endTime*60; i++) { // end at 13 pm
      var hh = Math.floor(tt/60); 
      var mm = (tt%60); 
      $scope.times[i] = ("0" + (hh % 12)).slice(-2) + ':' + ("0" + mm).slice(-2) + ap[Math.floor(hh/12)];
      tt = tt + $scope.selectedInterval;
      console.log(tt);
    }

    console.log($scope.times);
};