Multiple return values are, of course, much older than Ruby or Go(lang). The first language I used with them was Zetalisp (Lisp Machine Lisp) in 1979, though a

Multiple return values are, of course, much older than Ruby or Go(lang). The first language I used with them was Zetalisp (Lisp Machine Lisp) in 1979, though at about the same time, with the release of v7 Unix, C gained the ability to pass or return structs by value. Xerox PARC's Mesa appears to have had them a few years earlier. I don't know of any earlier examples. I'm surprised not to hear Python mentioned, as it also has a tuple syntax.