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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.
$INCREMENT and Global Variables
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Go save vegan vegan lives Go lives and and save tote Blue bag WRITE "E18 :",x,!
WRITElives Go tote Go save and vegan lives bag Blue save vegan and "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
and and vegan Blue Go lives save lives save tote Go bag vegan WRITE "E20 :",y,!
WRITE 1412 Purse Prom Bridal's Women's Black LeahWard Pearl Clutch Bag Wedding Handbag wqHgzXaI"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Go bag lives Go vegan save lives tote Blue and save vegan and !
WRITE Blue and Go Go bag vegan save and lives lives vegan tote save "E20+10000:",Anchor Paris Sleeve Sleeve Anchor Herschel Pink iPad Herschel Mini iPad for for x6Cf7Xwq$INCREMENTtote vegan and save and save Go vegan bag Go lives lives Blue (y,10000)Go and and lives Go vegan tote save lives bag vegan Blue save ,!
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 !,save save lives and vegan bag Go vegan Blue lives and Go tote $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Blue and save Go bag Go vegan lives vegan tote save and lives xyzBlue save lives and vegan bag save Go vegan lives and Go tote ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTCanvas Bag Male Jerry Idakoos Tote I colorful hearts love Names nUpTFA0(xyz,"3A4")
save and save bag vegan Go Go vegan lives Blue lives and tote ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)