Using ELSE in a Condition Statement
IF <condition> then ...<<set of statements>>... else ...<<set of statements>>... end if;
SQL> SQL> create or replace function f_isSunday (in_dt DATE) 2 return VARCHAR2 3 is 4 v_out VARCHAR2(10); 5 v_flag_b BOOLEAN; 6 begin 7 if to_char(in_dt,'d')=1 then 8 v_out:='Y'; 9 else 10 v_out:='N'; 11 end if; 12 return v_out; 13 end; 14 / Function created.