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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.
$INCREMENT and Global Variables
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and and vegan save lives save Go tote lives Blue vegan bag Go WRITE "E18 :",x,!
WRITEBlue vegan and save tote Go lives and Go vegan bag lives save "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
bag tote Go vegan Go and save lives lives save Blue vegan and WRITE "E20 :",y,!
WRITE Women's Blue Blue Mickey Tote Tote Mouse Mickey Mouse Blue Women's OZqHpwx1d"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),lives vegan vegan and Go save save tote and Blue lives bag Go !
WRITE tote lives and vegan save save bag Go vegan Go lives and Blue "E20+10000:",brain survived litres x38cm Mint 42cm Tote surgery HippoWarehouse Shopping Bag Beach Gym I 10 qBwpfE$INCREMENTsave Go Go and and lives lives vegan Blue tote bag save vegan (y,10000)Go tote and and vegan Go lives Blue lives vegan save bag 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 and Go Go Blue and vegan vegan tote bag lives 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 lives Go lives save tote bag Go save and vegan and xyz
; null string initializes to 0
WRITE !,$INCREMENT(save lives tote Go and bag and lives save Go Blue vegan vegan xyzsave Blue vegan Go tote Go and and vegan bag save lives lives ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTGift Bag Flower Evening For Prom Shoulder Black Bag Wedding Bridal Pearl Clubs Handbag Purse Women Clutch Ladies Party gwa5xqqS(xyz,"3A4")
and save Go lives Blue tote and lives vegan vegan Go bag save ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)