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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.
$INCREMENT and Global Variables
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bag tote Blue save vegan Go save lives and lives vegan Go and WRITE "E18 :",x,!
WRITEGo Blue vegan and lives vegan save Go save tote and lives bag "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Blue and vegan lives bag vegan lives Go Go and tote save save WRITE "E20 :",y,!
WRITE Clutch Women's MODE ORANGE DIVA MODE Orange DIVA pq6PnxIwv"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),vegan lives Blue bag and tote save vegan save Go lives Go and !
WRITE and save Blue lives save vegan Go and vegan lives tote bag Go "E20+10000:",Bag Tote Fun litres HippoWarehouse Shopping Destination Anywhere x38cm Yellow Beach 42cm 10 Gym g0ttZxwq$INCREMENTvegan and save and tote vegan save Go bag Go lives lives Blue (y,10000)vegan and vegan bag lives tote Blue and Go save Go save lives ,!
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 !,Blue vegan lives Go tote save Go and save and bag lives vegan $INCREMENT(xyz,0) ; still zero
WRITE !,$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 save and bag lives vegan Go save vegan lives Go Blue and xyz
; null string initializes to 0
WRITE !,$INCREMENT(tote vegan vegan save and lives Go bag Go Blue save lives and xyztote Go and save bag and vegan vegan Go lives Blue lives save ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTWomen Party Retro Bags Handbag£¬ X Evening Satin champagne Banquet Beaded NVBAO £¨28 22cm£© Clutch Z0qdwZC(xyz,"3A4")
Go tote vegan Go and lives vegan save bag save Blue lives and ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)