Return distance and duration between two addresses

GoogleMaps.js

/**
* Get Distance between 2 different addresses.
* @param start_address Address as string Ex. "בורגשוב 35, תל אביב"
* @param end_address Address as string Ex. "הקישון 140,תל אביב"
* @param ret Return type as string Ex. "km" or "duration". default is both
* @customfunction
*/
function GOOGLEMAPS(start_address,end_address,ret) {
  
 // start_address = "Tel aviv";
 // end_address = "Haifa";
  
  var mapObj = Maps.newDirectionFinder();
  mapObj.setOrigin(start_address) ;
  mapObj.setDestination(end_address) ;
  
  var directions = mapObj.getDirections();
 // Logger.log(directions["routes"][0]["legs"][0]["distance"]["value"]);
  
  var meters = directions["routes"][0]["legs"][0]["distance"]["value"];
  var km = (meters /1000).toFixed(2);
  
  var duration = directions["routes"][0]["legs"][0]["duration"]["value"];
  var minutes = Math.round(duration / 60);
  
  switch(ret) {
    case "km":
      return km;
      break;
    case "duration":
      return minutes;
      break;
    default:
      return km + " km in " + minutes + " minutes"
  }
  
  //Logger.log(duration) ;
}