Test.swift

import UIKit

class ViewController: UIViewController {
     let testData_a = ["0","1","3","0","2"]
     let testData_b = ["1","2","3","4","5"]
     let testData_c = ["1","0","3","2","0"]
  
     @IBOutlet weak var testBtn_a: UIButton!
     @IBOutlet weak var testBtn_b: UIButton!
     @IBOutlet weak var testBtn_a: UIButton!
     @IBOutlet weak var title_Label: UILabel!
     
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.  
   
   
       title_Label.text = testData_a[0]
       testBtn_a.setTitle(testData_a[0], for: UIControlState.normal)
       testBtn_b.setTitle(testData_b[0], for: UIControlState.normal)
       testBtn_c.setTitle(testData_c[0], for: UIControlState.normal)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}