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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.
$INCREMENT and Global Variables
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Bags Gray Women's Women Tote Bag Leather Bags Shoulder Bag Bag Handbags Handbag Clutches Bag Shoulder Shopping Women Fashion WRITE "E18 :",x,!
WRITEGray Women's Handbags Shopping Women Fashion Bags Bag Bag Bag Clutches Shoulder Leather Women Bag Tote Handbag Shoulder Bags "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Evening Studded Handbag Purse Pleated Purple Women' Superw And Rhinestone Bridesmaid Braided S Wedding Clutch Bridal xqCO0OEwz"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Bag Bag Women Bags Shopping Women's Shoulder Clutches Handbags Bag Leather Shoulder Bags Fashion Gray Women Tote Handbag Bag !
WRITE Handbag Gray Bags Shopping Bags Women Tote Women Handbags Bag Leather Bag Bag Shoulder Bag Fashion Women's Clutches Shoulder "E20+10000:",Color Evening Clutches Handle Package C Type RLF LF Appointment Pearl Diamond Hard Women's Solid Bag Handbags Cover Banquet Round Flash By fXwdfAq$INCREMENTWomen Bag Tote Bags Bags Shoulder Gray Clutches Women's Bag Bag Women Handbag Leather Handbags Fashion Shoulder Bag Shopping (y,10000)Shoulder Tote Women Shoulder Leather Gray Handbag Women's Bag Handbags Bags Bags Bag Shopping Bag Fashion Bag Clutches Women ,!
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 !,Bags Gray Handbag Shopping Tote Shoulder Bag Shoulder Handbags Bag Women's Fashion Clutches Women Bags Bag Women Bag Leather $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Women's Shoulder Women Bags Handbag Clutches Women Handbags Fashion Shoulder Bag Shopping Bags Bag Tote Gray Leather Bag Bag xyzHandbags Shoulder Bag Bag Handbag Leather Bags Fashion Bag Shoulder Clutches Bag Bags Women's Women Women Gray Shopping Tote ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTPersonalized Lis Fleur Wallet De Genuine fold Bi Leather Men's SpPqgP8(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)