FILLER Clause in COBOL

FILLER Clause:

FILLER is a reserved word, It is a level number and precedes a PICTURE clause that defines a field’s size and data type.

Consider the statements given below:
1) 01 f pic x(80) value all “-“.
This statement causes a line of 80 characters filled with “-“
2) 01 f pic x(60) value all “*“.
This statement causes a line of 60 characters filled with “*“
3) 01 filler pic x(10) value “TESTING”.

Note: We can either use simply “f” or “filler” in the statements.
Generally, fillers are used to improve the clarity of the output and form designs utilize the potential of filler clauses to the maximum.