PHWinfo - Afficher un message - newbie question: how to convert str to int in c-shell?

31/10/2006, 09h07

On 2006-10-31, neo wrote:
> hi, i am a newbie in shell. i am using c shell.

If you want to write a script, don't use csh.

> say convert a argument to int.
> if it is not a int , some flag or message should be got.
> how to do so in a neat way?

A simple test for a numeric argument, in a standard shell is:

case $n in
*[!0-9]*) printf "%s\n" "Not a number" ;;
esac

--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

31/10/2006, 09h07	#2
Chris F.A. Johnson Messages: n/a Hébergeur:	Re: newbie question: how to convert str to int in c-shell? On 2006-10-31, neo wrote: > hi, i am a newbie in shell. i am using c shell. If you want to write a script, don't use csh. > say convert a argument to int. > if it is not a int , some flag or message should be got. > how to do so in a neat way? A simple test for a numeric argument, in a standard shell is: case $n in [!0-9]) printf "%s\n" "Not a number" ;; esac -- Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell> Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress) ===== My code in this post, if any, assumes the POSIX locale ===== and is released under the GNU General Public Licence