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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.
$INCREMENT and Global Variables
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womens Candy Rock Multi Johnson Johnson Rock Multi Candy Betsey womens Betsey WRITE "E18 :",x,!
WRITERock Multi Johnson womens Multi womens Candy Johnson Candy Betsey Betsey Rock "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
womens Candy Johnson Betsey Johnson Rock Multi Betsey Multi Rock Candy womens WRITE "E20 :",y,!
WRITE Anti 47 X18 Theft Venturesafe liters Daypack Black Black cm 100 Black Backpack 100 PacSafe 18 Black Casual qFTEAwBwx"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),womens womens Multi Candy Betsey Multi Betsey Johnson Rock Rock Johnson Candy !
WRITE Johnson Multi Rock Multi womens Betsey womens Candy Candy Betsey Johnson Rock "E20+10000:",Exquisite Ball Enjoysports Bag Evening Bags Party amp; Bag Beads Bridal Wedding Sequin Women for Pink Handmade Beaded Glitter Vintage Handbag Cluth rwq4vxrH$INCREMENTJohnson womens Betsey womens Multi Johnson Candy Rock Betsey Rock Multi Candy (y,10000)Multi Johnson Candy Rock womens Johnson Candy womens Betsey Multi Rock Betsey ,!
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 !,Multi womens Betsey Rock Johnson Johnson womens Multi Betsey Rock Candy Candy $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(womens Rock Multi Candy Johnson Betsey Multi Rock womens Betsey Candy Johnson xyzBetsey Betsey womens Rock Multi Rock womens Johnson Candy Multi Candy Johnson ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBeaded Evening Vintage Red Sequin Flower Wine Women's Handbags Belsen fwEqp1ZF(xyz,"3A4")
Johnson Multi Candy Betsey Johnson Rock Multi womens Candy Betsey womens Rock ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)