title: Function created with compilation error
body: <p>I'm trying to create a function</p>
  
  <pre><code>CREATE OR REPLACE FUNCTION late_return_fee
  (number_of_books IN NUMBER, days_of_late_return IN NUMBER)
  RETURN DEC(4, 2)
  IS
  fee DEC(4,2);   
  BEGIN
  fee := number_of_books *(days_of_late_return*0.50);
  RETURN fee;
  END;
  /
  </code></pre>
  
  <p>but it come out error : Function created with compilation error. Please Help</p>