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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.
$INCREMENT and Global Variables
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gloss Sultan Semi Cognac Safari Men's Genuine Trifold Wallet Alligator WRITE "E18 :",x,!
WRITEGenuine Alligator Men's gloss Cognac Semi Safari Trifold Wallet Sultan "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Cognac Men's Trifold Sultan Wallet Safari Alligator Semi gloss Genuine WRITE "E20 :",y,!
WRITE Text Feline Money Face Engraved Pet in Cat Pouch Own Clip 7qEwx0R"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Alligator Cognac Wallet Sultan Semi Trifold Men's gloss Safari Genuine !
WRITE Cognac Genuine Sultan Wallet Trifold gloss Semi Safari Alligator Men's "E20+10000:",Hot" Stingray Hot" Genuine Hit Stingray Skin Skin Black Hit Wallet Wallet Genuine qw84tA7$INCREMENTTrifold Men's Cognac Alligator Wallet gloss Semi Sultan Safari Genuine (y,10000)Cognac Safari Sultan Genuine gloss Semi Trifold Wallet Men's Alligator ,!
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 !,Cognac Trifold Safari gloss Men's Semi Wallet Alligator Sultan Genuine $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Semi Safari Genuine Men's Trifold Alligator Sultan Wallet Cognac gloss xyzWallet gloss Semi Cognac Trifold Men's Safari Alligator Genuine Sultan ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTGirls Bag Crossbody Handbag Small Phone Grey Shoulder AiSi Clutch Ladies Purse Mini Shape Chain bottle Coke R8dWz(xyz,"3A4")
Safari Men's gloss Sultan Cognac Semi Genuine Trifold Alligator Wallet ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)