Below examples explains how various data types are internally stored in memory
PIC S9999 DISPLAY
Value : + 1234
Internal representation: F1 F2 F3 C4
Value : - 1234
Internal representation: F1 F2 F3 D4
Value : 1234
Internal representation: F1 F2 F3 C4
PIC 9999 DISPLAY
Value : 1234
Internal representation: F1 F2 F3 F4
PIC S9999 DISPLAY SIGN LEADING
Value : + 1234
Internal representation: C1 F2 F3 F4
Value : - 1234
Internal representation: D1 F2 F3 F4
PIC S9999 DISPLAY SIGN LEADING SEPARATE
Value : + 1234
Internal representation: 4E F1 F2 F3 F4
Value : - 1234
Internal representation: 60 F1 F2 F3 F4
PIC S9999 DISPLAY SIGN TRAILING SEPARATE
Value : + 1234
Internal representation: F1 F2 F3 F4 4E
Value : - 1234
Internal representation: F1 F2 F3 F4 60
PIC S9999 BINARY /PIC S9999 COMP/PIC S9999 COMP-4
Value : + 1234
Internal representation: 04 D2
Value : - 1234
Internal representation: FB 2E
PIC S9999 COMP-5
Value : + 123451
Internal representation: 30 39
Value : - 123451
Internal representation: CF C7
PIC 9999 COMP-5
Value : 600001
Internal representation: EA 60
The example demonstrates that COMP-5 data items can contain values of magnitude up to the capacity of the native binary representation (2, 4, or 8 bytes), rather than being limited to the value implied by the number of 9s in the PICTURE clause.
PIC 9999 BINARY/PIC 9999 COMP/PIC 9999 COMP-4
Value : 1234
Internal representation: 04 D2
PIC S9999 PACKED-DECIMAL/PIC S9999 COMP-3
Value : + 1234
Internal representation: 01 23 4C
Value : - 1234
Internal representation: 01 23 4D
PIC 9999 PACKED-DECIMAL/PIC 9999 COMP-3
Value : + 1234
Internal representation: 01 23 4F
Value : - 1234
Internal representation: 01 23 4F
COMP-1
Value : + 1234
Internal representation: 43 4D 20 00
Value : - 1234
Internal representation: C3 4D 20 00
COMP-2
Value : + 1234
Internal representation: 43 4D 20 00 00 00 00 00
Value : - 1234
Internal representation:C3 4D 20 00 00 00 00 00
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