Function problem in PL/SQL

Question

hello everyone, i just made a function chk_teacher_title which is giving me following error please have a look on this:
SQL> create or replace function chk_teacher_title(job_title_in IN varchar2(23))return boolean
  2  IS
  3    i number;
  4    count_rows number;
  5    job_title varchar2(23);
  6    return_value boolean;
  7  BEGIN
  8       select count(*) into count_rows from teacher;
  9       for i in 1..count_rows
10       loop
11           select title into job_title from teacher where t_no=100+i;
12           if job_title=job_title_in then
13              return_value:=TRUE;
14           else
15              return_value:=FALSE;
16           end if;
17      end loop;
18       return return_value;
19  END chk_teacher_title;
20  /
Warning: Function created with compilation errors.
SQL> show errors;
Errors for FUNCTION CHK_TEACHER_TITLE:
LINE/COL
ERROR
1/52
PLS-00103: Encountered the symbol "(" when expecting one of the following:
   := . ) , @ % default character
The symbol ":=" was substituted for "(" to continue.Thanks in advance.:)

Answer 1

Prathamesh wrote:
create or replace function chk_teacher_title(job_title_in IN varchar)return boolean
From the documentation:
Currently, VARCHAR is synonymous with VARCHAR2. However, in future releases of PL/SQL, to accommodate emerging SQL standards, VARCHAR might become a separate datatype with different comparison semantics. It is a good idea to use VARCHAR2 rather than VARCHAR.