How to Use String Interpolation

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 city = "Paris"
let temperature = 18.5

let message = "It is (temperature) C in (city)."
print(message)

Notes

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