Is there a way to use cvar via say command?

I am experimenting with Cvars.

Those are variables set in the server and or client.

List here: https://developer.valvesoftware.com/wiki/List_of_DOTA_2_Cvars

I want to export some of those via the say command but i am missing the syntax to do so.

For example:

say "My Hostport is :%s" %hostport

and

say "My Hostport is :" +hostport

does not work.

If there is a way with autoexec i would love to use that too.