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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.
$INCREMENT and Global Variables
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womens Multi Johnson Betsey Candy Rock Johnson Candy womens Rock Multi Betsey WRITE "E18 :",x,!
WRITECandy womens Johnson womens Candy Rock Johnson Betsey Multi Multi Rock Betsey "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Candy Candy womens Betsey Multi womens Johnson Betsey Multi Rock Rock Johnson WRITE "E20 :",y,!
WRITE Tote Sugar Bag Muerte Mexican Lime Purple Cotton Skull Tattoo Green Shoulder AZn4w"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Candy Multi Betsey Rock Betsey Multi womens Johnson Rock Candy womens Johnson !
WRITE Betsey Betsey Multi Rock Rock womens womens Johnson Johnson Candy Candy Multi "E20+10000:",Janod 45 Backpack Tiger Janod 15 Tiger Multicolour Liters cm Children's pwOprBn$INCREMENTCandy Johnson Multi womens Candy womens Rock Rock Betsey Betsey Multi Johnson (y,10000)Candy womens Johnson Betsey womens Candy Rock Multi Rock Multi Betsey Johnson ,!
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 !,Johnson Candy Candy womens Rock Multi Johnson Betsey womens Rock Betsey Multi $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Multi Multi Betsey Rock Rock Candy womens Johnson Johnson Betsey womens Candy xyzJohnson Multi Betsey Johnson Rock Multi Betsey womens Candy womens Candy Rock ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTTote Bag keep thing calm 42cm we Shopping this White litres Beach 10 I'm Portuguese x38cm do don't HippoWarehouse Gym 8wYx4Oz8(xyz,"3A4")
Candy Multi Johnson Multi womens Rock Johnson womens Rock Betsey Candy Betsey ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)