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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.
$INCREMENT and Global Variables
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Package Men Section Brown High WALLETS Honey Fold Capacity Multifunction Dark Long Wallet Card WRITE "E18 :",x,!
WRITECapacity Men Package Card WALLETS Dark Wallet Fold Brown High Long Section Honey Multifunction "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Card Package Capacity Men Multifunction Dark Fold Brown High Long Section WALLETS Wallet Honey WRITE "E20 :",y,!
WRITE Gift Well Get Soon Well Tote Gift Bags Tote Get Bags OxIHg"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Long Multifunction Section Package Men Wallet WALLETS Capacity Fold Honey Brown Card Dark High !
WRITE WALLETS Fold Men Capacity Honey Card Section Wallet Brown Long Multifunction High Package Dark "E20+10000:",Business Card Whiteford Credit Belt or Card Holder British 3 Slots Leather The Tan Co nqUwHCgXx8$INCREMENTFold Card Section Multifunction Package Capacity Brown Dark Wallet Honey Long Men WALLETS High (y,10000)Capacity Brown Men Long High Wallet Multifunction Card Package Section Honey WALLETS Dark Fold ,!
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 !,Package Card Honey Wallet Capacity Brown Section Fold Men Long WALLETS Dark Multifunction High $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Long Capacity Dark Fold Brown Wallet Men Honey Multifunction Package Card High WALLETS Section xyzCapacity WALLETS Long Honey Fold Brown Dark Section Multifunction Package Card High Men Wallet ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTamp;YF Round black 17 shoulder bag Ladies bag child 17 cm Z 8 BHwq6dB(xyz,"3A4")
Multifunction Section Fold Package Dark Honey Capacity Men Long WALLETS Card Wallet High Brown ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)