How to create packages in oracle?

Question

I am student working as a traneecan you please help me out in solving this problem
Its urgent

Answer 1

Package is a useful container. It can have Procedures, Functions, variables, declarations etc. as its members.
It has two parts: Header and specification.
Header is created as:
Create or replace package as
...
...
end ;
In header you declare all variables, procedure/function names.
In specification or Body, you write actual code.
Create or replace package body
as
...
end ;

without header, body can't be created