1

I can see the language guide at The Basics — The Swift Programming Language (Swift 5.7)

Is there a PDF of the guide for Swift 4.2? If so, where can I find it?

2

The document is only available as ePub
https://swift.org/documentation/TheSwiftProgrammingLanguage(Swift4.2).epub

But you can create a PDF from it yourself with an online converter.
https://ebook.online-convert.com/convert-to-pdf

1 Like
3

I had the same question, and ended up making my own (couldn't get the epub to print nicely). GitHub - joshmangum/swift-language-guide-pdf: A pdf version of the Swift Language Guide

Happy to take PRs!