Aiza wrote:
Thomas wrote:
On Thu, Jun 24, 2010 at 09:24:39AM +0800, Aiza wrote:
Hello,
Receiving a variable from the command line that is suppose
to contain numeric values.
How do I code a test to verify the content is numeric?
http://www.google.com/search?q=shell+test+if+variable+numeric
First link =>
http://www.unix.com/shell-programming-scripting/46276-check-variable-if-its-non-numeric.html
Gosh, Google is full of answers these days..
yea but none of them are for freebsd style .sh shell
I'm, using
[ "${dup_times}" != [0-9] ] && exerr "value not numeric"
and get the errot messahe no mater what value is in dup_times.
What is wrong with this code?
Tried this suggestion from a reply and it worked.
Only valid numeric value is whole numbers.
if expr "${dup_times}" : "[0-9]*$"
then
echo "value is numeric"
else
echo "value is not numeric"
fi
But when I tried this format
[ expr "${dup_times}" : "[0-9]*$" ] || echo "value is not numeric"
I get the error message no mater what the value is.
What am I doing wrong?
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "[email protected]"
