Back Ground: //  incomeMonOne = NSPopUp containing months Jan –> Dec // incomeMonTwo = NSTextField // index of incomeMonOne = 3 for Mar   Question: How do I get the title of (index + 6)?  I want to copy this title to incomeMonTwo.      example:…

  @IBOutlet var nameHere: UITextField!       @IBOutlet var sumHere: UILabel!         @IBAction func submit(_ sender: Any) {           let (a, b, c, d, e, f, g, h, i) = (1, 2, 3, 4, 5, 6, 7, 8, 9)         let emptyArray:…