How to check that my script can check if it has a specific range of charcters.
Hi so I'm new to scripting and pretty much everything.
I made a script that counts the amount of times a word occurs in a specific file. but now i have to make the script check that the first argument (the word i'm looking to count) is made up of only the specific characters a,c,g,t. and i also have to make my script check that the second argument is a file that contains only a,c,g,t characters in it. if anyone could help that would be awesome!