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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.
$INCREMENT and Global Variables
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WRITEBags Clutches Leather Bag Gray Bags Tote Shoulder Fashion Shopping Women Women's Handbags Women Bag Shoulder Bag Handbag Bag "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE ‘House of ‘House Tweed Tweed ‘House Tweed of ‘House of Tweed of rq7rCz"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Fashion Handbags Shoulder Handbag Women's Tote Shopping Women Gray Leather Women Shoulder Bags Bags Bag Bag Clutches Bag Bag !
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WRITE "E20+1 :",$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 !,Clutches Fashion Bag Bags Handbag Bag Bags Bag Women Women Women's Leather Tote Shoulder Shoulder Shopping Handbags Bag Gray $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bags Shopping Women Bag Shoulder Bag Fashion Shoulder Gray Bags Leather Handbags Bag Tote Women's Bag Women Handbag Clutches xyzShoulder Bag Shoulder Handbag Women Leather Bags Women Fashion Women's Handbags Clutches Bag Bag Bag Shopping Bags Tote Gray ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTamp; Personalized Bi Chevron Genuine Men's Leather fold Wallet Anchor BSnxAR(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)