You simply say "farvel", the danish equivalent of "farewell"...
Adios
antio
Au revoir
Adios - Goodbye
Tot ziens!
Hallo Totsiens
adios amigos
We say "chao" or "hasta luego" or " no vemos manana" or "chabelas".
DOWIDZENIA ( dOUGH-VI-Z-E-NEEA
I've always enjoyed "have a good one"
"No" in Danish is ingen
Ø is the Danish word for island. If you want to say it in plural, say øer.