Re: Syntax/implementation question

[Philipp Janda <siffiejoe@...>]

Am 27.07.2016 um 19:16 schröbte Nagaev Boris:
> On Wed, Jul 27, 2016 at 7:18 PM, Daurnimator <quae@daurnimator.com> wrote:
> > On 27 July 2016 at 19:20, Martin <eden_martin_fuhrspam@gmx.de> wrote:
> > > Lua 5.3.3  Copyright (C) 1994-2016 Lua.org, PUC-Rio
> > > > print(1), print(2), print(3)
> > > 1
> > > 2
> > > 3
> > > nil     nil
> > The 'nil, nil' output is the return value of that expression: print
> > doesn't return anything, but when you have a subsequent return value
> > the 'nothing' is coerced to `nil`.
>
> Why does it print "nil, nil" and not "nil, nil, nil"?

As Daurnimator already indicated, no return value is a special case of 
multiple return values: In certain situations multiple (or no) values 
are coerced into one value, in other situations, like at the end of an 
expression list, they are taken as is. All `print()` calls return no 
value, but only the last call is the last expression of an expression 
list, so the other two calls are coerced to one `nil` value each.

Philipp