Bash Script - Fibonacci

Question

I was trying to make a recursive function that can calculate the Fibonacci of the enter number, by the way I got stuck on how to get the values obtained by the recursion.

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Answer 1

I got stuck on how to get the values obtained by the recursion.

You already have it right in the last line of your script - $?. Just do the same in fib - replace

      term1=$(fib $number)
      …
      term2=$(fib $number)

with

      fib $number; term1=$?
      …
      fib $number; term2=$?

Still your script returns strange values, but surely you can resume from here. (set -x might help.)