How to Use Dictionaries

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

var ages = ["Ava": 28, "Liam": 31]
ages["Noah"] = 25

if let age = ages["Ava"] {
    print("Ava is (age)")
}

Notes

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