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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.
$INCREMENT and Global Variables
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bag lives vegan tote Go Blue and Go save vegan and lives save WRITE "E18 :",x,!
WRITEsave save Go bag Blue vegan tote lives lives and and Go vegan "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Blue and vegan and lives Go save vegan Go save lives tote bag WRITE "E20 :",y,!
WRITE Small Shoulder Domybest PU Cross Blue Messenger Body Dark Bags Women Classic Bag C00x4qTwF"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),bag Blue lives tote save and Go and Go lives vegan save vegan !
WRITE vegan Go lives Blue tote vegan save bag save lives and and Go "E20+10000:",Fashion Girls HoHope Daypack Rucksack Backpack Blue Waterproof Womens Casual Bag 8xqTqpnI6w$INCREMENTvegan bag tote lives save Go Blue and lives save and vegan Go (y,10000)lives vegan and lives vegan tote Go save and save Blue Go bag ,!
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 lives Go save tote save and and Blue Go vegan lives bag $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLsave and lives vegan Blue Go vegan lives bag save tote and Go xyz
; null string initializes to 0
WRITE !,$INCREMENT(vegan bag save Go Go vegan lives and Blue and save lives tote xyzand Go save and lives vegan Go lives save vegan tote Blue bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTMessenger Large Handbag Vococal Bag Shoulder Capacity Blue Ladies Black Leather PU Tote Women wqzFgqB(xyz,"3A4")
lives and Go Blue lives vegan bag vegan Go tote save and save ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)