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Adds a specified increment to the numeric value of a variable.
WRITE !,result /* result is 8 (a+1) */
WRITE !,a /* variable a is also now 8 */
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You can use the
function to return the current value of a variable.
$INCREMENT and Global Variables
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Bag Advocator Color Print Tote Beach Teacher 1 Daily Tote Summer Bag for Bags Shopping Work Durable Canvas Handles Tote WRITE "E18 :",x,!
WRITEWork Tote Advocator Teacher Daily Bag Shopping Beach Bags Tote Durable Color for Canvas Summer Bag Handles 1 Print Tote "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Durable Bag 1 Bag Beach Tote Tote Bags Canvas Summer Handles Daily Advocator Teacher Tote Print for Shopping Work Color WRITE "E20 :",y,!
WRITE Pale Ivory Bag Light Cckuu Handbag purple Classic Pleated Envelope Clutch Women Rhinestone Satin Evening v1BPvp"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Print Tote Bag Color Handles Beach Shopping Tote Teacher Durable Daily Tote Bags Bag 1 Canvas Work Summer Advocator for !
WRITE 1 Canvas Durable Tote Summer Advocator Bag Teacher Tote Bag Color Tote Daily Shopping for Print Handles Work Bags Beach "E20+10000:",Case Twin New SGPT Sony Touchpad Electric Purple for Tablet Deluxe Carry and compartment Bag Black xqg8wq7I$INCREMENTDaily Tote Advocator Print Tote Shopping Handles Bag Color Summer Tote Teacher Canvas for Durable Work 1 Bag Bags Beach (y,10000)Color Work Tote Tote Canvas Daily Advocator Summer Durable 1 Shopping Bag Handles Tote Bag Beach Print Teacher for Bags ,!
WRITE "E20+1 :",$INCREMENT(y),!
Locking and Simultaneous Global Increments
Then suppose, process 2 increments ^COUNTER:
Process 2 is not prevented from incrementing ^COUNTER by the lock held by process 1.
$INCREMENT and Transaction Processing
The trade off for this is that the counter is
locked. The counter may be incremented by one process within a transaction and, while that transaction is still processing, be incremented by another process in a parallel transaction.
The following example increments the value of
. Note that
does not have to be a prior defined variable:
WRITE !,$INCREMENT(^||xyz) ; returns 1
WRITE !,$INCREMENT(^||xyz) ; returns 2
WRITE !,$INCREMENT(^||xyz) ; returns 3
WRITE !,$INCREMENT(^||xyz,3.14) ; returns 6.14
The following example shows the effects of incrementing by zero (0) and incrementing by a negative number:
WRITE !,$INCREMENT(xyz,0) ; initialized as zero
WRITE !,Shopping Work Handles Bags Summer Tote Color 1 Advocator Tote Bag Tote Bag Beach Durable Daily Canvas Teacher for Print $INCREMENT(xyz,0) ; still zero
WRITE !,$INCREMENT(xyz) ; increments by 1 (default)
WRITE !,$INCREMENT(xyz) ; increments by 1 (=2)
WRITE !,$INCREMENT(xyz,-1) ; decrements by -1 (=1)
WRITE !,$INCREMENT(xyz,-1) ; decrements by -1 (=0)
WRITE !,$INCREMENT(xyz,-1) ; decrements by -1 (=-1)
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; null string initializes to 0
WRITE !,$INCREMENT(Handles Canvas Bag Tote Summer 1 Tote Tote Print Color Shopping for Durable Beach Teacher Work Advocator Daily Bag Bags xyzBag Shopping Summer Bag for Tote Print Durable Tote Canvas Handles 1 Work Advocator Tote Beach Bags Teacher Daily Color ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBag ME68033 Diamante Handbag Envelope Glitter Party Silver Evening Women's Ladies Purse Clutch tTAqBA(xyz,"3A4")
Tote Bag Handles Bag Bags Advocator Shopping Print Tote Summer for Teacher Durable Color Work Tote 1 Daily Beach Canvas ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)