SQL & PL/SQL :: FUNCTIONS - Bind Variables?

Create and invoke the GET_JOB function to return a job title.
a.Create and compile a function called GET_JOB to return a job title.
b.Create a VARCHAR2 host variable called b_title, allowing a length of 35 characters. Invoke the function with job ID SA_REP to return the value in the host variable, and then print the host variable to view the result.

This is my FUNCTION:
CREATE OR REPLACE
FUNCTION GET_JOB(
p_jobid IN jobs.job_id%TYPE)
RETURN VARCHAR2

[code]...

This is how I invoked the FUNCTION but WHILE DECLARING THE BIND VARIABLE IT IS GIVING ME AN ERROR!!!!!

VARIABLE b_title VARCHAR2(35)
set serveroutput on
DECLARE
P_JOBID VARCHAR2(10);
v_jobtitle VARCHAR2(200);

[code]...