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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.
$INCREMENT and Global Variables
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Fashion Bags Gray Women's Handbag Shoulder Women Bag Bag Handbags Bags Bag Shopping Clutches Tote Bag Women Shoulder Leather WRITE "E18 :",x,!
WRITEHandbags Clutches Shoulder Bag Tote Women Handbag Gray Bag Bag Shoulder Leather Bags Women Bags Bag Fashion Women's Shopping "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Cufflinks James Clip I Coffee Cup amp; Love Money Bean Bond TnqRSa4"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Gray Shoulder Fashion Shopping Handbags Leather Bag Handbag Bag Tote Shoulder Bag Women Women Women's Bags Bag Clutches Bags !
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WRITE "E20+1 :",$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 !,Women Bag Bags Handbags Shoulder Bag Leather Women Bag Clutches Bags Shoulder Gray Handbag Bag Fashion Women's Tote Shopping $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Women's Bag Clutches Bag Shoulder Women Bags Women Handbag Bag Fashion Bag Gray Leather Handbags Shopping Tote Shoulder Bags xyzBag Shoulder Bags Bag Clutches Handbag Bag Bags Women Fashion Shopping Handbags Gray Shoulder Leather Tote Women Women's Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTEnvelope Leather Evening PU Clutches Pink2 NOTAG Casual Strap Women Party Bag Chain Clutch For Handbag With wIxTxqYO(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)