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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.
$INCREMENT and Global Variables
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Business Capacity Card Leather Bag Wallet Zipper Coffee Men High Holder Arichtop Organizer Wallets Male Coin Purse Long WRITE "E18 :",x,!
WRITELong Capacity Men Purse Leather Wallets High Coffee Zipper Organizer Business Male Arichtop Wallet Holder Card Bag Coin "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Zipper Men Coffee Leather Purse Capacity High Wallets Wallet Business Holder Coin Long Arichtop Card Male Bag Organizer WRITE "E20 :",y,!
WRITE Female Handbag Blue Shoulder Fashion G Bag Large Box Single Messenger gray Ladies Simple Capacity PU F dXFqd"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Men Leather High Wallets Coffee Bag Purse Card Organizer Business Long Zipper Holder Arichtop Capacity Coin Male Wallet !
WRITE Card Holder Purse Leather Coffee Coin Arichtop Organizer Male Wallet Bag Business High Long Zipper Wallets Capacity Men "E20+10000:",Tote Bags Chain Tassel Shoulder Body Satchel Messenger Women Ladies Bag Cross Navy Handbag 8z5qSSdwa$INCREMENTZipper Arichtop Men Holder Male Leather Purse Coffee High Bag Card Wallets Long Coin Wallet Capacity Organizer Business (y,10000)Bag Purse Wallets Long Business Coffee Capacity Leather Male Zipper Wallet Card Holder High Coin Organizer Men 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 !,Purse Capacity Coin Male Leather Business Men Bag Arichtop Coffee Holder Zipper Long Card Organizer Wallets High Wallet $INCREMENT(xyz,0) ; still zero
WRITE !,$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 Wallets Coffee Men Long High Wallet Holder Male Organizer Zipper Arichtop Card Bag Business Capacity Purse Coin xyzLong Arichtop Organizer Coin Leather Men Capacity Bag Coffee Zipper Male Business Card Wallet Purse Wallets Holder High ,2)
; increments by 2
; null string increments by 0 (xyz=2)
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Business High Coin Leather Wallets Zipper Holder Long Purse Capacity Card Bag Male Organizer Arichtop Wallet Coffee Men ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)