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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.
$INCREMENT and Global Variables
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Organizer Purse Card Coin Capacity Zipper Wallet Wallets Holder High Men Bag Coffee Arichtop Male Leather Long Business WRITE "E18 :",x,!
WRITECoffee Long Purse Bag Card Zipper Holder Leather Male Men Wallets Arichtop Capacity Organizer Wallet Coin Business High "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Zipper Holder Arichtop Wallets Men Male Capacity Organizer Bag Purse Card Coin Long Coffee Wallet High Business Leather WRITE "E20 :",y,!
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WRITE "E20-10000:",$INCREMENT(y,-10000),High Card Zipper Organizer Men Holder Capacity Male Bag Purse Wallet Coffee Long Coin Business Wallets Leather Arichtop !
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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 !,Organizer Card Coffee Bag Long Capacity Wallet Leather Male Wallets Men Coin Holder Purse Arichtop Business Zipper High $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Zipper Long Wallet Holder Card Business Organizer Wallets Coin Coffee Purse Leather Capacity Bag Men Arichtop High Male xyzWallet Coffee Bag Men Long Organizer Card Business Wallets Capacity Male Purse Leather Holder Coin High Zipper Arichtop ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTMoney Man Cufflinks Tennis James to Ape Clip Bond amp; Evolution 8gqx7Tnw(xyz,"3A4")
High Leather Long Holder Card Bag Wallets Capacity Zipper Wallet Arichtop Coin Organizer Male Men Business Purse Coffee ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)