I'm not sure that's quite what I need.
I'm looking for a way to test a string and depending on what the first character is run one of two sub routines. If the string starts with any thing other than a number from 0-9 run sub "A". If it starts with a number from 0-9 run sub "B".
I'm trying to read text and pass it to my lisp. Some of the text will read "TC ###.##" and some will read "###.## TC". I want to end up with only the number, no alpha characters.