On Thu, 2009-03-12 at 15:56 +0000, Roy Marples wrote:
> > one thing I didnt find yet in any docu: how can I catch if a string is
> > entered instead of a number with read?
>
> if ! printf "%d" $n >/dev/null 2>&1; then
> echo "You didn't enter a number"
> exit 1
> fi
Alternatively:
case $n in
*[^0-9]*) echo "You didn't enter a number"; exit 1 ;;
esac
(checks to see if any non-numeric character exists in $n).
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