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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.
$INCREMENT and Global Variables
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42cm work Bag optician x38cm Gym Quiet Shopping at please Navy HippoWarehouse Beach French 10 litres Tote WRITE "E18 :",x,!
WRITENavy Quiet optician HippoWarehouse Beach 42cm work Bag x38cm please Gym Shopping 10 French Tote litres at "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Handbag Faux Women's Bucket Bag Bag Ladies Black Two Shoulder Stylish Leather Tone MA36049 Zip RXwR5gqY"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Beach Quiet Gym litres French at HippoWarehouse Navy 10 please work 42cm Tote x38cm Shopping Bag optician !
WRITE please work HippoWarehouse at Beach Quiet Navy Shopping French 10 42cm x38cm Gym Tote litres Bag optician "E20+10000:",Canvas Multi Women's Style Bag HAUTE Color LA Shoulder Fashion Tote Handbag 1 Shopper Hobo 7tXUPTq$INCREMENTNavy work Bag 10 Tote Shopping litres please French Beach at optician Quiet 42cm HippoWarehouse x38cm Gym (y,10000)Gym Tote optician Quiet 10 litres 42cm Bag Beach Navy at French HippoWarehouse work please Shopping x38cm ,!
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 !,x38cm Tote please work at Gym French Navy 10 42cm Quiet litres Beach HippoWarehouse Shopping optician Bag $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(at Bag French litres 10 x38cm Beach work 42cm optician Tote please Quiet Navy Gym HippoWarehouse Shopping xyzat HippoWarehouse 42cm Navy Bag Gym French Beach Quiet work please Shopping Tote 10 optician litres x38cm ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENT'Poodle Azeeda Holder Wallet Dog' Card Credit Card CH00013740 Business adwdIrq(xyz,"3A4")
work Navy 10 Bag Tote please x38cm 42cm Gym Beach optician Shopping French at HippoWarehouse litres Quiet ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)