How to exit from PostgreSQL command line utility: psql

Question

What command or short key can I use to exit the PostgreSQL command line utility psql?

Answer 1

Specifically speaking, how to exit from the following status on Ubuntu 18.04.

I put the original status as follows.

postgres@user:~$

If psql is inputed, it changes to the new status as follows.

postgres@user:~$ psql

postgres=# 

If \q is inputed, please see the operation.

postgres@user:~$ \q

It changes to the original status as follows.

postgres@user:~$

The quick way is to kill the terminal. But I want to know other quit method without killing the terminal.

Thanks,