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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.
$INCREMENT and Global Variables
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Shoulder Waterproof Retro Red Portable Large Soft Color Coffee Bag Capacity Messenger Ladies Shoulder Leather Oil FangYOU1314 WRITE "E18 :",x,!
WRITEShoulder Leather FangYOU1314 Capacity Messenger Ladies Large Color Oil Coffee Red Bag Retro Soft Shoulder Portable Waterproof "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Messenger Capacity Red Shoulder Oil Bag Large Soft Ladies Leather FangYOU1314 Portable Retro Waterproof Color Shoulder Coffee WRITE "E20 :",y,!
WRITE Tote Eddany Freestyle Bag Eddany Eat Eat Canvas Swimming sleep qTwa0npxZ"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Red Leather Large Coffee Waterproof Bag Retro Capacity Color Shoulder Oil Shoulder FangYOU1314 Ladies Portable Messenger Soft !
WRITE Messenger Waterproof Oil Portable Retro Red Leather FangYOU1314 Shoulder Color Soft Capacity Ladies Large Bag Shoulder Coffee "E20+10000:",Lulu Lips Body Guinness Cross Red Crossbody Women's Red Bag rExrnq7$INCREMENTRetro Portable Soft Bag Capacity Leather Messenger FangYOU1314 Shoulder Large Oil Color Shoulder Ladies Red Coffee Waterproof (y,10000)Shoulder Retro Portable Ladies Capacity Oil Bag Messenger Coffee Leather FangYOU1314 Waterproof Red Shoulder Large Soft Color ,!
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 !,Ladies Shoulder Leather Bag Soft Red Capacity Coffee FangYOU1314 Oil Waterproof Portable Messenger Retro Large Shoulder Color $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLRed Ladies Shoulder Capacity Shoulder Portable Large Leather Soft Waterproof Color Messenger Coffee Bag Retro Oil FangYOU1314 xyz
; null string initializes to 0
WRITE !,$INCREMENT(Soft Messenger Red FangYOU1314 Retro Ladies Shoulder Capacity Oil Color Coffee Large Waterproof Portable Shoulder Leather Bag xyzWaterproof Red Capacity Ladies Coffee Soft Large Shoulder Portable Bag FangYOU1314 Retro Color Shoulder Oil Messenger Leather ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBag with PU Totes 14 Tote Casual for Handbag Wallet Color Teacher Womens Travel Girls Advocator Bag Leather tFwCOC(xyz,"3A4")
Oil Retro FangYOU1314 Soft Shoulder Large Color Coffee Capacity Messenger Red Bag Waterproof Ladies Shoulder Leather Portable ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)