On Thu, May 23, 2024 at 2:49 AM Steffen Nurpmeso <stef...@sdaoden.eu> wrote: > Only to note that this is not portable. > The FreeBSD shell will not assign "b" to "c" for this one!
Nor will NetBSD sh. This lets you swap values of two variables without using a third $ x=1 y=2 $ x=$y y=$x $ echo $x $y 2 1 And some Bourne shells expand command substitutions first $ (exit 5) $ x=$? y=`exit 10` $ echo $x 10
