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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.
$INCREMENT and Global Variables
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vegan save lives and vegan Go Blue bag lives tote save Go and WRITE "E18 :",x,!
WRITElives tote vegan vegan save Go bag save Go Blue and lives and "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Go Go lives save vegan tote save lives and Blue and vegan bag WRITE "E20 :",y,!
WRITE Bag Cloth G Goat Blue Natural CafePress Tote Is For Shopping Bag Canvas CaxdqFP"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),bag Blue Go tote save vegan lives and vegan lives save and Go !
WRITE vegan and Go and lives lives Blue bag Go save vegan tote save "E20+10000:",Drawstring Backpack F Print Women Bags Shoulder Yuhemii Unicorn Girls wZaUnq$INCREMENTvegan save Go lives tote save lives vegan bag Blue and and Go (y,10000)vegan save and bag Blue lives save lives tote vegan Go and 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 !,save lives tote Blue vegan and save bag Go and lives vegan Go $INCREMENT(xyz,0) ; still zero
WRITE !,$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 Go lives bag and and lives vegan Go Blue tote save save xyz
; null string initializes to 0
WRITE !,$INCREMENT(save save Go vegan Go bag vegan lives lives and and Blue tote xyzvegan save and bag lives Go and lives tote save Blue Go vegan ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBody Beaded GFM Clutch 11 Wristlet Wrist Purse Pouch Bag Soft bag Dark Evening Gold Shaped Little SN gwgEnTBqH(xyz,"3A4")
save lives Blue vegan lives tote Go save vegan and Go bag and ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)