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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.
$INCREMENT and Global Variables
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Natural 1998 Bag Shopping For Birthday Life Born Tote 30th In Print4u WRITE "E18 :",x,!
WRITEBorn Shopping Print4u Natural Bag 1998 30th For Life Tote In Birthday "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
1998 Bag Life For Tote Print4u Natural Shopping In Birthday 30th Born WRITE "E20 :",y,!
WRITE Women's Messenger Dark Shoulder Grey PU Handbags leather bag Totes bag rRXrp"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Born Life In For 1998 30th Birthday Tote Print4u Shopping Natural Bag !
WRITE Bag Birthday In Tote For 1998 Born Life Shopping 30th Natural Print4u "E20+10000:",Small Crossbody Rebecca Rebecca Chevron Small Minkoff Quilted Black Chevron Quilted Love Minkoff 1wOSdRS$INCREMENTTote Shopping 1998 Natural In Birthday 30th Bag Life Print4u Born For (y,10000)Natural Bag Shopping 1998 Life Print4u In 30th Born For Tote Birthday ,!
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 !,Print4u Bag Born 30th Life 1998 In Natural For Tote Birthday Shopping $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILL30th Life Bag In Birthday Tote Natural Print4u Born 1998 Shopping For xyz
; null string initializes to 0
WRITE !,$INCREMENT(Natural Print4u Tote Life 1998 30th For Bag In Shopping Birthday Born xyzBag Life For Shopping 1998 Born Print4u Natural Birthday Tote 30th In ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTHyrule Gold Zelda Black Of Wallet The gold Kingdom Legend Black qtx0EfZB(xyz,"3A4")
For 1998 Bag Born Tote 30th Life Print4u In Natural Birthday Shopping ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)