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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.
$INCREMENT and Global Variables
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Bag Women's Shoulder Italian Body Jinne Leather Cross Di Navy Montte Bucket WRITE "E18 :",x,!
WRITELeather Navy Women's Italian Bag Jinne Body Shoulder Bucket Di Cross Montte "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Montte Jinne Bucket Bag Leather Di Body Cross Shoulder Italian Women's Navy WRITE "E20 :",y,!
WRITE Phone Domybest PU Wallets Stars Women Wristlets Leather Coin Pink Mini Holder Long Clutch qHWW0r6vn"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Cross Women's Jinne Bag Body Shoulder Italian Montte Navy Leather Di Bucket !
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WRITE "E20+1 :",$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 !,Bucket Di Navy Bag Montte Jinne Women's Cross Leather Body Italian Shoulder $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bag Italian Jinne Di Shoulder Cross Women's Leather Body Bucket Navy Montte xyzNavy Women's Jinne Body Italian Shoulder Bag Montte Leather Di Cross Bucket ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTSunburst Vintage Coffee Handbag Peacock Navy Catching Eye and Unusual Sequin Turquoise Evening ADOO Purse Teal Antique Clutch Beaded 1UwRdvR(xyz,"3A4")
Body Shoulder Women's Italian Montte Bag Navy Jinne Bucket Cross Di Leather ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)