Oracle SQL Compiles, but seems to break out of loop when select loop returns nothing/empty - oracle

Question

I am still quite new to pl/sql... but here I have a script that works well when data exists...But I also need it to work when the select statement does NOT have any value to return (is empty). When the select statement is empty, dbms_output.put_line does not show anything, even when I write a complete string there, so I think the loop is exiting when nothing is found. Online, I stumbled upon Union and Exception...but nothing that seems to work accurately in a loop.
WHAT I AM ASKING IS: How to run this script even when data DOES NOT EXIST??? AND How do I tell which value is empty? Is it the postal_code or the fipcode, or BOTH?
DECLARE
F33_35 VARCHAR2(3) := rpad('0',3,'0');
BEGIN
FOR tabVals IN (SELECT DISTINCT pa.postal_code, fip.fipcode
FROM voucher v
INNER JOIN cc_authorization cca
ON cca.cc_authorization_id = v.cc_authorization_id
INNER JOIN episode e
ON cca.subsidy_id = e.episode_id
INNER JOIN case c
ON c.case_id = e.case_id
INNER JOIN invoice_item ii
ON ii.voucher_id = v.voucher_id
INNER JOIN invoice i
ON i.invoice_id = ii.invoice_id
INNER JOIN svcperiod_info s
ON s.svcperiod_id = i.svcperiod_id
INNER JOIN party_contact_mech pcm
ON pcm.party_id = c.identifying_party
INNER JOIN postal_address pa
ON pcm.contact_mech_id = pa.contact_mech_id
INNER JOIN VT_FIPS_MAP fip
ON substr(pa.POSTAL_CODE,1,5) = substr(fip.ZIPCODE,1,5)
WHERE ii.status = 8 AND
ii.net_amount > 0 AND
s.end_dt >= DATE'2017-04-01' AND
s.end_dt < DATE'2017-04-30' AND
c.case_id = 104570 AND
pcm.contact_mech_purpose_cd = 4 AND
pcm.current_ind = 1
ORDER BY POSTAL_CODE, FIPCODE)
LOOP
F33_35 := substr(F33_35 || tabVals.fipcode,-3);
DBMS_OUTPUT.PUT_LINE('F String: 50' || F33_35);
--- RESET certain variables for loop
F33_35 := rpad('0',3,'0');
END LOOP;
END;

Answer 1

you are correct when you say
...I think the loop is exiting when nothing is found...
the cursor for loop can be considered a special case of regular loop.
eg.
for a in (<select statement>) LOOP
--do stuff here
END LOOP;
is effectively just shorthand for
declare
cursor c is
<select statement>;
a c%ROWTYPE;
begin
open c;
LOOP
FETCH c INTO a;
EXIT WHEN c%NOTFOUND;
--do stuff here
END LOOP;
so you can no see that no code would be executed if the query returns 0 rows.
possible the best solution for running code if your statement returns 0 rows is to set a flag inside the loop and check it afterwards. (as suggested by #tony-Andrews )
a second option is to rewrite as the long version of the loop above and move the EXIT WHEN statement to after the "do stuff"