Using a count variable in a file name

Question

I have a quick question. I just wanted to know if it was valid format (using bash shell scripting) to have a counter for a loop in a file name. I am thinking something along

Answer 1

If you only want to make a bunch of files and don't need the loop for anything else, you can skip the loop altogether:

touch file{1..12}.txt

will make them all in one command.

If you have Bash 4, you can get leading zeros like this:

touch file{01..12}.txt