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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.
$INCREMENT and Global Variables
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Long Dark Wallet High Capacity Brown Men Card Multifunction Package Honey Section Fold WALLETS WRITE "E18 :",x,!
WRITEPackage WALLETS High Fold Section Honey Wallet Men Card Brown Multifunction Long Dark Capacity "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Section Card Package WALLETS Dark High Fold Wallet Long Honey Multifunction Brown Capacity Men WRITE "E20 :",y,!
WRITE Handbag Shoulder Hand Leather Womens Italian LeahWard Made or Real Grey BackPack YWzgw"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Men Dark Package Wallet Capacity Multifunction Brown High WALLETS Card Fold Section Honey Long !
WRITE Honey Fold Men High WALLETS Long Package Wallet Capacity Multifunction Card Section Dark Brown "E20+10000:",Ua Under Backpack 001 Armour Boys' Traditional Under Scrimmage Black Armour RaSqZwI$INCREMENTDark Wallet Fold Brown Multifunction Long Card WALLETS Men High Section Capacity Honey Package (y,10000)Card Multifunction Wallet Package Section Dark Brown WALLETS Fold Long Men High Capacity Honey ,!
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 !,Section High Multifunction WALLETS Capacity Card Package Honey Wallet Men Fold Long Dark Brown $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Honey Card Capacity Men Brown Multifunction Long Dark High Section WALLETS Package Fold Wallet xyzDark Card Multifunction Men Long WALLETS Wallet High Honey Package Fold Capacity Section Brown ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTDark Shoulderbag Ruffles Body Blue Bag Cross Women’s Blue Lhz Oilily w7q861(xyz,"3A4")
Section Multifunction Fold Long WALLETS Card Men Package Wallet Dark Brown High Honey Capacity ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)