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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.
$INCREMENT and Global Variables
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2018 amp;DORIS Bag Fashoin Tote Pendant Handbag Khaki Crossbody NICOLE Bag Shoulder Hardware PU Bag New Women Black Casual for Girls WRITE "E18 :",x,!
WRITECasual Bag Tote Khaki Hardware Black Shoulder New Crossbody NICOLE PU Bag Pendant 2018 Girls Handbag Bag Fashoin amp;DORIS Women for "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Girly Girly HandBags Charcoal Envelope Bag HandBags Clutch Envelope 6R6E4Uqf"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Hardware Pendant Casual Girls Crossbody New Tote Black Handbag Bag NICOLE for Shoulder Women Fashoin PU Khaki Bag 2018 Bag amp;DORIS !
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WRITE "E20+1 :",$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 !,Hardware Bag Bag Shoulder Handbag Fashoin Tote Casual amp;DORIS New NICOLE Crossbody 2018 for Khaki Girls Pendant Women Black PU Bag $INCREMENT(xyz,0) ; still zero
WRITE !,$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(NICOLE Crossbody for Bag amp;DORIS Pendant PU Hardware New Bag Fashoin Tote Women Girls Khaki Casual Handbag Shoulder 2018 Black Bag xyzHandbag Women Shoulder New Bag for Pendant NICOLE Bag Crossbody PU Girls Tote 2018 Black Khaki Bag amp;DORIS Hardware Casual Fashoin ,2)
; increments by 2
; null string increments by 0 (xyz=2)
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for Black PU Girls Bag Hardware New Bag amp;DORIS Shoulder Pendant Fashoin Casual Crossbody Tote Bag Khaki NICOLE Handbag 2018 Women ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)