swift swift_optional3.swift

Posted 2021-05-19

var price:Float? = getPrice(name: "item")
let text = "Price is - "

if price != nil {
    let message = text + "\(price!)"  // compile-time error: error: value of optional type 'String?' not unwrapped; did you mean to use '!' or '?'?
    print(message)
}