[SQL] pgsql and cursor

[Najm Hashmi]

Hi all, I am not sure If it is allowed to use cursor inside pgsql functions.
If it is possible, please someone could send exact synatx  how it is used. If
it is not allowed  is there a way arround it? I need to do some calculations
and then return this value as text.
Thanks in advance for all your help.
Najm