Answer Posted / ramanuajam

subroutines are usefull, it can reduce the redendency.
and we can minimise code.

Ex. I have finance project. I need noof day calculation
between todates for every program.
I wont write this code in ever program.
i pass the date1, date2 and noof days through main program.
like

main1.cob
call 'nodays' using date1,date2,nodays.

sub.cob
linkage section.
01 wdate1 pic 9(8).
01 wdate2 pic 9(8).
01 wnodays pic 9(4).
procedure division using wdate1,wdate2,wnodays.
mm.

write your logic.
exit program.

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