Re: Incrementing variable=0 with arithmetic expansion causes Return code = 1

[Greg Wooledge]

On Fri, Aug 28, 2020 at 08:00:30AM +0000, Gabriel Winkler wrote:
> # Causes error
> test=0
> ((test++))
> echo $?
> 1
> echo $test
> 1

https://mywiki.wooledge.org/BashFAQ/105

Exercise 1.  And 2.  And the whole rest of the page.