Session expiration zero

I would like a confirmation regarding session expiries.
The documentation isn't clear or I didn't understand it very well.

In app/Config/Session.php  what would be the results with :

Code:

    public int $expiration = 0;

The number of seconds you would like the session to last.
If you would like a non-expiring session (until browser is closed) set the value to zero: 0

or

If expiration is set to 0, the session.gc_maxlifetime setting set by PHP in session management will be used as-is (often the default value of 1440). This needs to be changed in php.ini or via ini_set() as needed.