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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.
$INCREMENT and Global Variables
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WRITEBags Women Shopping Women's Bag Bags Clutches Gray Bag Leather Fashion Women Bag Handbag Shoulder Tote Shoulder Bag Handbags "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE black 13 Kansas Litres Conference Shugon Kansas Bag Shugon CwgqOz81"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Leather Shoulder Clutches Bag Women Bag Women Women's Shoulder Gray Bags Bag Bag Tote Handbag Fashion Bags Handbags Shopping !
WRITE Bag Handbags Fashion Women Leather Shoulder Handbag Bag Bag Gray Bags Clutches Tote Shoulder Bags Bag Women's Shopping Women "E20+10000:",shopping Abyssinian bag shopping bag Cat Cotton Cotton Abyssinian Cat Cat shopping Cream Abyssinian Cotton Cream bag dvgAd1$INCREMENTLeather Bag Bag Tote Shoulder Women Shoulder Bags Handbags Gray Fashion Bag Women's Bags Shopping Women Clutches Handbag Bag (y,10000)Tote Shopping Gray Leather Handbags Bag Bags Bag Women Women's Bag Shoulder Women Bag Clutches Handbag Shoulder Bags Fashion ,!
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 Leather Gray Bag Tote Shopping Bag Clutches Fashion Bags Handbag Handbags Bag Women Bag Shoulder Shoulder Women Women's $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Clutches Tote Bag Women Shoulder Fashion Shopping Women's Shoulder Gray Bag Handbags Bag Leather Bags Bags Women Bag Handbag xyzBag Women Tote Handbags Bags Women's Leather Handbag Gray Women Bags Shoulder Shoulder Bag Bag Bag Shopping Clutches Fashion ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTPurse Women Ladies Grey Bag for Wristlet Shoulder Handbag Clutch Envelope Evening 5qzqU(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)