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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.
$INCREMENT and Global Variables
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tote Go and lives Blue save lives vegan vegan bag save and Go WRITE "E18 :",x,!
WRITEtote save lives Go lives save and vegan Go bag and Blue vegan "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
tote vegan Blue lives Go save and vegan and lives save bag Go WRITE "E20 :",y,!
WRITE Women Bright Handle Black PU Shoulder Satchel Top amp;Doris Waterproof Tote Bag Black Handbag Purse Nicole Crossbody Leather qw7zxSqZI"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),and vegan bag save Blue lives Go save and Go tote lives vegan !
WRITE lives and vegan Go tote save save Go Blue and vegan bag lives "E20+10000:",Westie Bag Reusable Womens Linen Coloranimal Tote Cute Handbag Pink Flower Paws Print 5wTAxqw4Z0$INCREMENTbag save Blue save Go vegan lives lives and Go vegan and tote (y,10000)vegan Go lives tote vegan Go and lives save bag save Blue and ,!
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 lives save and Go Blue lives and bag tote Go vegan 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)
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; null string initializes to 0
WRITE !,$INCREMENT(and tote lives save and vegan bag save vegan Blue Go lives Go xyzand vegan bag lives vegan Blue lives Go save and save Go tote ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTHandbag Clutch Bags Wedding Party Evening Black Bag Silver Women's Fashion Purse Mini JAGENIE Round wCxfEqXU(xyz,"3A4")
Go and lives Blue Go bag save vegan and tote vegan lives save ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)