How to change Swift version from 5 to 4 in Xcode?

Question

I am programming with Swift in Xcode (MacBook Air 2015) and I want to change my Swift version from 5 to 4. How to do that?

Answer 1

Project ► (Select Your Project Target) ► Build Settings ► (Type
'swift_version' in the Search bar) Swift Compiler Language ► Swift
Language Version ► Click on Language list

Here you can change your version.