How to Save Data with UserDefaults

Steps

1. Paste the code into a Swift file or playground.
2. Run it once to verify the output.
3. Adjust the inputs to match your use case.

Copy and paste

import Foundation

let defaults = UserDefaults.standard

defaults.set(true, forKey: "hasSeenIntro")
let seen = defaults.bool(forKey: "hasSeenIntro")
print(seen)

Notes

• Keep functions small and focused for reuse.
• Prefer safe APIs like optionals and guards.