https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Functions.html https://developer.apple.com/library/content

https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Functions.html https://developer.apple.com/library/content/documentation/Sw... Swift forces you to use named parameters if you don't do that.