Bag DCCN Beach Tote Brown Canvas Shopper Red Women's C zCXCFBqU
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.
$INCREMENT and Global Variables
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Bag Brown Tote DCCN Shopper Beach C Women's Red Canvas WRITE "E18 :",x,!
WRITEBrown Bag Beach C Women's Tote Shopper Canvas DCCN Red "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Beach Shopper C Women's Bag Canvas Tote DCCN Red Brown WRITE "E20 :",y,!
WRITE KeyChain Metal Silver Skulls Big Jeans Chains Wallet Links Biker Skeletons Men ZPFnAqn"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Shopper Women's Brown Beach Tote DCCN Bag Canvas Red C !
WRITE Brown Shopper Women's C Tote DCCN Canvas Beach Red Bag "E20+10000:",Clutch Handbags Bag Women's Bridal Clutches Gray Evening Superw Embossing Cocktail Glitter Purse wqnTv18x1$INCREMENTCanvas Red Bag C Brown Women's DCCN Shopper Tote Beach (y,10000)C Tote Beach Canvas Brown Women's Bag Shopper DCCN Red ,!
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 !,DCCN Red Bag Shopper Canvas Tote Beach Brown Women's C $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLTote Canvas Shopper Women's Red Bag DCCN Brown C Beach xyz
; null string initializes to 0
WRITE !,$INCREMENT(C Beach Bag Shopper DCCN Brown Red Canvas Tote Women's xyzBeach Tote Women's Canvas C DCCN Bag Shopper Red Brown ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTVintage Black Zippered DailyObjects For 13" Nylon Sleeve Ballistic Laptop MacBook Stripes FqSdwZ5dxA(xyz,"3A4")
Tote Bag Women's Brown Canvas C Shopper Beach Red DCCN ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)