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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.
$INCREMENT and Global Variables
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Johnson Betsey womens Johnson womens Betsey Candy Rock Rock Multi Multi Candy WRITE "E18 :",x,!
WRITEBetsey Johnson Rock Multi Candy womens Rock Johnson Candy Betsey womens Multi "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Johnson Candy Johnson Rock Multi womens Rock womens Betsey Multi Candy Betsey WRITE "E20 :",y,!
WRITE Rabbit Flybloom Organizer Handbag Zipper Pink Bags Card Silicone Holder Shape Light Wallet Purse Purse Yellow Coin Lovely qfxIw41fF"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Candy Multi Johnson Betsey Betsey Rock Candy Johnson Multi womens Rock womens !
WRITE Johnson Johnson Multi Candy Candy Betsey womens Multi Betsey Rock womens Rock "E20+10000:",Bag Linen 4585 4585 Bag PICARD Wicked Wicked Linen PICARD PICARD Bag Wicked qwvwRO8f$INCREMENTBetsey womens Multi Candy Multi Johnson Rock Rock Candy Betsey womens Johnson (y,10000)womens Rock Multi womens Betsey Multi Johnson Candy Rock Betsey Candy 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 !,Rock Multi Candy Betsey Johnson Rock Betsey Johnson womens Multi Candy womens $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Johnson Rock Candy Betsey Betsey womens Multi Johnson Multi Candy Rock womens xyzCandy womens Rock Multi Multi womens Johnson Betsey Candy Rock Betsey Johnson ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTPU Drawstring Teenage Shoulder Powlance Girls School Bag Leather Backpacks 6 No Bag Women dTxqOI(xyz,"3A4")
Betsey Candy Johnson Multi Multi Rock womens Johnson womens Candy Betsey Rock ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)