is_number -- is a string numeric is_number(1) can be used in shell scripts to determine if a variable is all numeric. If expr(1) exists on your system, expr(1) can be used to validate if a string is all numeric. Compile Instructions are in the README.md File inside the tarball. $Id: is_number.txt,v 1.4 2025/03/24 14:08:45 jmccue Exp $