Reduce UserDefaults Integer Value - Swift

Question

Is there any way to reduce the UserDefaults integer key value?

This is my code to save it:

    var highScore = UserDefaults().integer(forKey: "HIGHSCORE")

How could reduce this value by a fixed integer?

So reduce by 20 etc?

Answer 1

First, obtain the old value of the high score. Then, do the arithmetic before finally saving the new value:

let oldValue = UserDefaults.standard.integer(forKey: "HIGHSCORE")
let newValue = oldValue - 20

UserDefaults.standard.set(newValue, forKey: "HIGHSCORE")