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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.
$INCREMENT and Global Variables
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WRITEBag Gray Handbag Shoulder Bag Shopping Bags Bags Women's Fashion Handbags Shoulder Women Women Bag Clutches Bag Leather Tote "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Pleated Triangle Damara Crystal Sparkling Women Red Flap Cocktail Handbag wZIIqgB"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Handbag Bag Shopping Bags Women Leather Handbags Bag Women Clutches Gray Fashion Shoulder Bag Shoulder Bags Bag Women's Tote !
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WRITE "E20+1 :",$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 Women's Tote Women Bag Fashion Bag Bag Bag Bags Shoulder Gray Shopping Bags Leather Shoulder Clutches Handbag Handbags $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bag Bag Bag Gray Handbag Shopping Clutches Women Bags Bag Fashion Shoulder Women Women's Shoulder Leather Bags Handbags Tote xyzShoulder Bag Bag Women's Gray Bags Handbag Bag Shopping Bags Women Fashion Tote Shoulder Leather Clutches Women Bag Handbags ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTGym Tote pig Surf Blue litres lady guinea 10 Shopping HippoWarehouse Crazy Beach 42cm Bag x38cm 7fqEISfYOc(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)