How to get the exit status a loop in bash

Question

I know how to check the status of the previously executed command using $?, and we can make that status using exit command. But for the loops in bash are always returning a

Answer 1

The bash manual says:

while list-1; do list-2; done
until list-1; do list-2; done
  [..]The exit status of the while and until commands is the exit status
  of the last command executed in list-2, or zero if none was executed.[..]

The last command that is executed inside the loop is break. And the exit value of break is 0 (see: help break).

This is why your program keeps exiting with 0.