Getting error after putting variable in select statement

Question

Hi All,
Kindly help me with Pl/sql code
here i'm trying to put variable in select statement ....
I successfully put the Yr and Mnth ..but getting error for loop variable "i"
Here i'm getting error that too because of " i" only-->TRIM(UPPER(TO_CHAR(TO_DATE(i||'-'||Mnth||'-'||Yr,'dd-Mon-YYYY'),'DAY')))
Please find the full code below.
Declare
Yr number not null:=2010;
Mnth varchar2(20) not null:='Jun';
v_val number:=0;
begin
for i in 1..2 loop
case i
SELECT count(*) into v_val
FROM DUAL
WHERE TRIM(UPPER(TO_CHAR(TO_DATE(i||'-'||Mnth||'-'||Yr,'dd-Mon-YYYY'),'DAY')))
in (UPPER('Monday'),UPPER('Tuesday'),UPPER('WEDNESDAY'),UPPER('THURSDAY'),UPPER('friday'))
end case;
end loop;
end;

Answer 1

Declare
  Yr number not null:=2010;
  Mnth varchar2(20) not null:='Jun';
  v_val number:=0;
begin
  for i in 1..2 loop
  SELECT count(*) into v_val
  FROM DUAL
  WHERE TRIM(UPPER(TO_CHAR(TO_DATE(i||'-'||Mnth||'-'||Yr,'dd-Mon-YYYY'),'DAY')))
  in (UPPER('Monday'),UPPER('Tuesday'),UPPER('WEDNESDAY'),UPPER('THURSDAY'),UPPER('friday'));
end loop;
end;