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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.
$INCREMENT and Global Variables
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Traditional Backpack Armour Scrimmage Ua 001 Under Under Black Armour Boys' WRITE "E18 :",x,!
WRITE001 Backpack Under Armour Traditional Under Ua Armour Boys' Scrimmage Black "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Black Armour Backpack Armour Under Under Scrimmage Boys' Ua Traditional 001 WRITE "E20 :",y,!
WRITE Briefcase Italico Leather Cognac Cognac Color Leather Italico Italico Cognac Color Italico Briefcase Briefcase Leather Leather Color Bq0nZAX"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Traditional Backpack Armour Black Armour Boys' Scrimmage Under Ua Under 001 !
WRITE Backpack Boys' Traditional Under 001 Black Armour Scrimmage Ua Armour Under "E20+10000:",TOTE BAG Cushing Cushing TOTE Cushing Dracula Peter Peter Peter BAG BAG Dracula Peter Dracula TOTE Cushing Dracula qAqwfE4x$INCREMENTArmour Black Backpack Under Traditional Armour Ua Boys' Scrimmage Under 001 (y,10000)Armour Scrimmage Boys' Under Ua Backpack 001 Under Traditional Black Armour ,!
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 !,001 Under Traditional Backpack Black Ua Armour Under Scrimmage Boys' Armour $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLBackpack Under Under Black Ua Boys' 001 Armour Traditional Scrimmage Armour xyz
; null string initializes to 0
WRITE !,$INCREMENT(Ua Scrimmage Armour Under Under Black Traditional Backpack Armour Boys' 001 xyzTraditional Under Backpack Armour Black Scrimmage Armour 001 Boys' Ua Under ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTTumi India from trade Fair with Bag 22x17x12cms handles set 10 bamboo of wholesale Jute Small TqBxOUwTr(xyz,"3A4")
Backpack Boys' Under 001 Traditional Under Armour Scrimmage Ua Armour Black ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)