Programming :: How To Add Users With Same Name To System

I have a useradd script that can be found here: [Bash] #!/bin/bash #useradd script while true; do echo Please Enter First Name - Pastebin.com.I need to add users that have the same name, while keeping with the current scheme, I'd just like to have numbers at the end of the user, for example joeuser, joeuser1, joeuser2... Basically, keeping with the current naming scheme, I would like to modify the script to automatically add a number to the end of the username when I have users that have the same name.