Write to terminal after redirecting stdout to a file without using stderr?

Question

I have two shell scripts, one that serves as the main \"program\" and another that serves as a \"library.\"

In several places in the \"program,\" I\'ll do something

Answer 1

Open /dev/tty on another FD.

exec 0< /dev/null
exec 1> /dev/null
exec 2> /dev/null
exec 3> /dev/tty
echo 'Hello, World!' >&3