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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.
$INCREMENT and Global Variables
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001 Black Backpack Traditional Ua Under Under Armour Armour Boys' Scrimmage WRITE "E18 :",x,!
WRITEBackpack Under Armour 001 Under Scrimmage Black Traditional Ua Boys' Armour "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Under Backpack Scrimmage Black Under Traditional Armour Boys' Armour Ua 001 WRITE "E20 :",y,!
WRITE Bag Bag Bag Canvas Box Lunch Khaki Handbag Keeping Lunch Women Tofree Fresh Blue Portable Insulation aR4qfn05"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Under Traditional 001 Backpack Armour Boys' Black Ua Under Armour Scrimmage !
WRITE Black Under Boys' Armour Scrimmage Backpack Traditional 001 Armour Ua Under "E20+10000:",Bag Nylon Theft Messenger Size Travel Pocket Casual Shoulder Women Waterproof Handbag Purse Bags Anti Large Crossbody Organize Pocket for Purple with Zipper Pack Bag vTnqww5fY$INCREMENTBoys' Armour Scrimmage 001 Black Traditional Under Backpack Ua Under Armour (y,10000)Under Armour Backpack Scrimmage Traditional Armour Ua Black Under 001 Boys' ,!
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 !,Ua Under 001 Black Under Boys' Traditional Armour Armour Scrimmage Backpack $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLArmour Scrimmage 001 Under Armour Traditional Boys' Ua Black Under Backpack xyz
; null string initializes to 0
WRITE !,$INCREMENT(Backpack Traditional Boys' Ua Under Armour 001 Armour Scrimmage Black Under xyzScrimmage Under Under Black 001 Ua Armour Boys' Armour Backpack Traditional ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTClutch Sequined Women Envelop Evening Handbag Bag Ladies Wedding Party Purses Black for Beaded Clutch Dinner Retro Banquet qwAfg1(xyz,"3A4")
Traditional Scrimmage Armour Black Boys' Under Backpack Armour Ua Under 001 ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)