wrong number or types of arguments in call to 'PUT_LINE'

[Eshwar Prasad]

I am new to PL/SQL Programming, I tried writing this small program.

declare
userid varchar2(25);
cursor user_cur is
select user_id from tuser where superuser='admin1UK';
begin
FOR userid in user_cur 
loop
dbms_output.put_line(userid);
end loop;
end;

But i received the error saying:

  
ERROR at line 9:
ORA-06550: line 9, column 1:
PLS-00306: wrong number or types of arguments in call to 'PUT_LINE'
ORA-06550: line 9, column 1:
PL/SQL: Statement ignored

When I remove the line "dbms_output.put_line(userid);", the program is compiling correctly.

Please let me know where am i doing wrong.

[krishna bala]

  declare   
userid varchar2(25);   
cursor user_cur is   
select user_id from tuser where superuser='admin1UK';   
begin   
FOR userid in user_cur    
loop   
dbms_output.put_line(userid.user_id );   
end loop;   
end;  

  it will work now .