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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.
$INCREMENT and Global Variables
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Leather Women Bags Bag Clutches Bag Shoulder Bag Handbag Women Bags Shoulder Gray Handbags Tote Shopping Fashion Women's Bag WRITE "E18 :",x,!
WRITELeather Fashion Bag Women's Bag Shoulder Shopping Clutches Bags Bag Bag Women Shoulder Gray Women Handbags Tote Handbag Bags "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE DORIS Hobo Women slouch handbags Totes Crossbody Black Leather Large bag amp; shoulder NICOLE 5Bwt44"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Bag Bag Women Women's Clutches Handbag Handbags Bags Bag Women Leather Tote Fashion Bags Shopping Bag Shoulder Gray Shoulder !
WRITE Bag Bag Bag Bag Women's Handbags Leather Shopping Bags Shoulder Clutches Women Fashion Handbag Shoulder Gray Bags Women Tote "E20+10000:",Black Vintage Women's Flower Wedding Bag Evening Bags for Shoulder Seed Handbag Beaded Sequin Bagood Clutches Prom Purses Bridal Party pRUwRxn$INCREMENTWomen Tote Bag Leather Bag Bag Bags Women's Clutches Shopping Bags Gray Bag Women Shoulder Shoulder Handbags Handbag Fashion (y,10000)Bags Fashion Bag Clutches Bags Women Leather Handbag Bag Shoulder Bag Handbags Bag Shopping Women's Women Tote Shoulder Gray ,!
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 !,Women's Bag Fashion Clutches Bags Shoulder Women Shopping Handbag Shoulder Bags Leather Handbags Bag Bag Women Bag Gray Tote $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bags Fashion Leather Clutches Bag Bag Gray Bag Tote Women's Bag Shoulder Shopping Women Women Shoulder Bags Handbags Handbag xyzShoulder Women Bags Shopping Bag Gray Bag Handbag Shoulder Fashion Women's Bags Women Bag Clutches Bag Handbags Tote Leather ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTWomen’s HandBag Tamaris HandBag Tamaris HandBag HandBag Women’s Tamaris HandBag Women’s Tamaris Women’s Women’s Women’s Tamaris Tamaris gxvRZ(xyz,"3A4")
Bag Bag Handbag Shopping Shoulder Women Handbags Gray Bag Clutches Bags Women Fashion Women's Bags Shoulder Leather Tote Bag ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)