Can I create and drop a function from inside a stored procedure in Oracle ?

[uvasag]

I'm converting SQL Server code into Oracle and would like to know if I can create and drop a function from inside an Oracle stored procedure. The SQL Server code seems to do it but when I try the same thing in an Oracle stored procedure it won't let me. Any help will be appreciated. Thanks.

[Oraculum1]

BEGIN
EXECUTE IMMEDIATE '
CREATE OR REPLACE FUNCTION YourFunction RETURN VARCHAR2 IS
BEGIN
RETURN(''Hello World'');
END YourFunction;
';
END;
/

BEGIN
dbms_output.put_line(YourFunction);
END;
/

BEGIN
EXECUTE IMMEDIATE 'drop Function YourFunction';
END;
/