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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.
$INCREMENT and Global Variables
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lives bag and tote lives Go and save vegan Go Blue save vegan WRITE "E18 :",x,!
WRITElives Go and lives Blue save bag vegan tote Go save vegan and "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
tote vegan and save lives Blue save Go Go and lives bag vegan WRITE "E20 :",y,!
WRITE pixelated Canvas I love Bag States Usa Wisconsin Tote Idakoos qa7zw"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),and vegan tote vegan Blue lives Go save and bag lives save Go !
WRITE lives vegan and vegan and Go tote lives Go Blue save save bag "E20+10000:",UK UK Stone Lila Women's Size Women's One Clutch Clutch coffee Bohnen Stone BwAS1E$INCREMENTGo Go save save bag vegan and and lives vegan lives Blue tote (y,10000)save bag and Blue and vegan save lives tote Go vegan lives Go ,!
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 !,vegan Blue bag and vegan and lives save Go save Go tote lives $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLvegan Blue save Go bag vegan lives and save Go lives and tote xyz
; null string initializes to 0
WRITE !,$INCREMENT(lives Blue save Go vegan bag save tote Go lives and and vegan xyzand Go lives bag vegan lives save and Blue save vegan tote Go ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTamp; blue Beach Tote pink Akzent blue Bag Canvas pink UXzW1n15(xyz,"3A4")
save and Go Blue vegan tote and lives lives bag Go save vegan ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)