Answer Posted / swathi.k

Redefines are used to reuse the storage space where as
renames are used to regroup the elementary items.

Ex:For redefines
01 A.
02 PIC X(6) VALUE 'SWATHI'.
02 REDEFINES A PIC X(2).
fOR RENAMES
01 A.
02 B PIC X(5).
02 C PIC X(5).
02 D.
03 D1 PIC X(2).
03 D2 PIC X(5).
02 E PIC X(6).
66 GROUP1 RENAMES C THRU E.
2.Redefines are coded with 0 to 49 level numbers where
as renames are declared with 66 level no.
3.pic clause is required for redefines where as pic clause
is not used for renames.

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