Re: Verifying numeric values

[Chris F.A. Johnson]

On Mon, 18 Oct 2021, Chris F.A. Johnson wrote:

> On Tue, 19 Oct 2021, tolugboji via wrote:
>
> > Would like to validate a numeric value (from 1 to 255, for use with 
> > terminfo).
> >
> > Am doing ( +([[:digit:]]) ), but I suspect that does not do the job
> >
> > case "$2" in
> > ( +([[:digit:]]) )
>
> case ${num//[0-9]/} in
>  ?*) echo bad ;;
>  *) echo OK ;;
> esac

Oops! Wrong version. Should be:

case ${num//[0-9]/} in
  ?*|"") echo bad ;;
  *)echo OK ;;
esac


--
   Chris F.A. Johnson