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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.
$INCREMENT and Global Variables
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Black Women Girls New PU Casual Fashoin for Shoulder NICOLE Hardware Bag Handbag Crossbody Bag amp;DORIS 2018 Bag Khaki Pendant Tote WRITE "E18 :",x,!
WRITEBag amp;DORIS for Shoulder New Khaki Black NICOLE Girls Hardware PU Women Fashoin 2018 Crossbody Bag Casual Pendant Bag Tote Handbag "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE "E20+1 :",$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 Black PU Casual NICOLE Shoulder Crossbody amp;DORIS New Bag 2018 Hardware Handbag Tote Bag Girls Fashoin for Bag Pendant Khaki $INCREMENT(xyz,0) ; still zero
WRITE !,$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 amp;DORIS Bag 2018 Khaki Bag Casual Pendant Black for Hardware Bag Shoulder Tote Women Crossbody New PU Girls Fashoin Handbag xyzBag Bag PU Khaki Women Handbag Bag Black Girls New Pendant NICOLE Casual 2018 Hardware Crossbody Tote Fashoin amp;DORIS for Shoulder ,2)
; increments by 2
; null string increments by 0 (xyz=2)
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)