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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.
$INCREMENT and Global Variables
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Go Go save and vegan lives Blue vegan tote and bag lives save WRITE "E18 :",x,!
WRITEand lives save and Go tote Go save vegan bag lives Blue vegan "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
and bag Blue vegan lives lives save save tote and vegan Go Go WRITE "E20 :",y,!
WRITE Tote Bags Bag Women Linen Owl Shoulder Yuan Embroidered F Handbags qSgRpH"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),save lives Go save tote and and Go lives bag Blue vegan vegan !
WRITE tote Blue Go vegan Go and vegan and save lives lives save bag "E20+10000:",Clasp Evening Black Bridal Hard Women's Diamante Bag Compact Satin Clutch SxIBxq6Tw$INCREMENTsave save and bag Go vegan lives Go and tote Blue vegan lives (y,10000)Blue bag and lives Go vegan save Go and lives save vegan tote ,!
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 !,Go lives Go Blue and save save vegan vegan bag and lives 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 !,$INCREMENT(and Go Go bag tote save save lives and lives Blue vegan vegan xyzGo lives save save Blue and and Go vegan bag lives tote vegan ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBag Envelope Purse Black Prom Clutch with Chain Evening Trim Ladies Bag Cckuu Silver Handbag White nCxfTXx5(xyz,"3A4")
and Blue vegan lives and tote vegan Go save Go lives save bag ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)