while using MOD in oracle sql, i am getting error

This is my code-
code

error-
number or types of arguments are calling =

i think it’s a syntax error. i am getting same error in most of my codes

>Solution :

Wrong syntax.

SQL> CREATE OR REPLACE FUNCTION comparisonlike (g IN VARCHAR2)
  2     RETURN VARCHAR2
  3  AS
  4  BEGIN
  5     RETURN CASE WHEN MOD (g, 2) = 0 THEN 'EVEN' ELSE 'ODD' END;
  6  END;
  7  /

Function created.

SQL> select comparisonlike(25) result from dual;

RESULT
--------------------
ODD

SQL> select comparisonlike(12) result from dual;

RESULT
--------------------
EVEN

SQL>