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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.
$INCREMENT and Global Variables
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Coin Coffee Zipper Purse Leather Arichtop Business Holder High Wallets Organizer Long Card Bag Male Wallet Capacity Men WRITE "E18 :",x,!
WRITEWallet Arichtop Holder Leather Card Male Bag Coffee Purse Business High Men Capacity Zipper Long Wallets Coin Organizer "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Purse Coffee Wallet Wallets Organizer Long Men Card Coin Zipper Bag Capacity High Male Business Arichtop Leather Holder WRITE "E20 :",y,!
WRITE Women Tote Handbag Shoulder Red Cross Messenger Body Satchel Leather Faux Bag Ladies YWCq878"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),High Capacity Card Men Long Leather Bag Holder Coin Purse Arichtop Organizer Zipper Male Business Coffee Wallets Wallet !
WRITE Organizer Wallets Arichtop Bag High Male Coin Holder Card Coffee Leather Men Capacity Business Zipper Purse Long Wallet "E20+10000:",Organiser Atlantic iPad Visconti 754 Body Sand Leather Kindle Cross Bag 4qH1w$INCREMENTOrganizer Purse Coin Holder Leather Arichtop Bag High Male Wallets Wallet Men Capacity Long Zipper Business Card Coffee (y,10000)Coin Coffee Leather Zipper High Card Bag Men Purse Holder Long Wallet Capacity Organizer Male Business Wallets Arichtop ,!
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 !,Leather Organizer Holder Business Long Capacity Bag Purse Zipper High Coffee Wallets Coin Arichtop Card Male Wallet Men $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Leather Capacity Long Male Holder Bag Wallet Business Coffee Arichtop Wallets Card Organizer High Coin Purse Men Zipper xyzBusiness Holder Wallets Bag Men Coffee Male Leather Card Zipper Long Purse Capacity Coin Wallet Arichtop High Organizer ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTRed Bag Europe Shoulder Doctor Womens DELEY Style Totes Handbag Vintage q1WpvE8wz(xyz,"3A4")
Long Male Holder Card Leather Men Zipper Coin Coffee Wallets Bag Business Purse Arichtop Wallet High Capacity Organizer ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)