Button not increasing score

My code below is trying to add to the score. If the button is pressed the score should go up its not going up. I have added a label and each time the button is pressed nothing is being added to the label. This is in swift 3.

 import UIKit

class ViewController: UIViewController {

var score = 0
@IBOutlet var scoreLabel: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    scoreLabel.text = String(score)
}


@IBAction func pressBUTTON(_ sender: Any) {
    score += 1

}

}

You are currently only setting the label’s text in viewDidLoad. You either need to do the same thing in the buttonPressed function, or you can use the didSet property observer on score.