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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.
$INCREMENT and Global Variables
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Bags Women Handbags Clutches Tote Shopping Shoulder Bag Bag Women's Handbag Women Bag Bags Bag Fashion Gray Leather Shoulder WRITE "E18 :",x,!
WRITEShopping Bag Tote Bag Leather Shoulder Bags Handbags Handbag Bags Gray Bag Bag Fashion Women's Women Clutches Women Shoulder "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE 10 Gym Peoples front HippoWarehouse Bag Cornflower Blue Tote 42cm Judea Beach of litres x38cm Shopping HUPw5Yqnwd"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Handbag Bag Women's Shopping Shoulder Bags Bag Bags Gray Women Women Bag Leather Fashion Bag Handbags Tote Shoulder Clutches !
WRITE Shopping Women Women Shoulder Handbags Tote Fashion Handbag Bags Leather Shoulder Bag Bag Bag Gray Women's Clutches Bag Bags "E20+10000:",Wine 55611 Tone Two Styles Patent Party Bag Handbag on Evening Sparkly Rock Bag Clutch Prom xUnfH1f$INCREMENTBags Bag Leather Clutches Tote Handbags Women Women Bag Women's Shoulder Handbag Shoulder Bags Fashion Gray Bag Bag Shopping (y,10000)Handbag Bag Gray Handbags Fashion Shoulder Women Bag Clutches Bag Bags Bag Women's Bags Shopping Shoulder Women Leather Tote ,!
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 Women Tote Bag Bag Clutches Bag Bags Leather Bags Handbag Women Shoulder Shoulder Gray Handbags Shopping Bag Fashion $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bag Shoulder Bags Fashion Clutches Women's Bag Leather Shopping Gray Shoulder Women Women Bags Handbags Bag Handbag Bag Tote xyzBag Women Bag Handbag Bags Handbags Women's Bag Clutches Fashion Bag Tote Bags Shopping Shoulder Leather Women Gray Shoulder ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTWhite Prom Hand Lovely Rhinestone Beaded Pearl Faux Wedding Color Bag Evening Women's Clutch Bridal Black Rabbit Bag Bag Bag 6wxFr6OqT(xyz,"3A4")
Handbags Tote Shoulder Shoulder Gray Shopping Leather Handbag Clutches Bags Bags Bag Bag Women's Bag Women Bag Fashion Women ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)