numbers and strings

From: <apaige_at_idulab.gov>
Date: Mon, 28 Oct 1996 12:31:19 -0500

Hi everyone,

Can anyone tell me how to check if a variable is a number or a string?
Or if there is a UNIX command that will automatically check for me?

Thanks,
>Andre' A.B. Paige
Received on Mon Oct 28 1996 - 19:27:50 NZDT