What shell are you using for your class assignment?

What do your class notes, your text book, or the manual page for your shell say is the proper format for a while loop? Since your assignment says you have to use a while loop, that would seem to be a good place to start (especially since neither of your coding attempts contains a while loop that isn't getting a syntax error).

Note that the syntax for a while loop is not the same as the syntax for a for loop. And, the script that you are writing does not need two loops. If you need to use a while loop, you do not need a for loop to get the job you are trying to do done.

As a hint, I would say that if you're using a while loop to solve this problem, anything using {1..100} is probably not going to help. Using that construct does not fit with the syntax of a while loop. And, after reading your other thread, I would comment that when you said you didn't know how to add numbers that weren't supplied as input from a user, you were wrong. The statement in your previous thread:

Code:

        sum=$((sum + $n))

did exactly that. Neither sum nor n were provided by a user, but you have a statement that is adding two numbers together when neither of those numbers were typed in by a user. This statement, or one very similar to it, is likely to be needed in your script. It doesn't contain any syntax errors and it does add two numbers together and store the updated results correctly.