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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.
$INCREMENT and Global Variables
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Handbag Bag Retro Bag Bag Shoulder Satchel Stylish Bag Boston Messenger Stylefour Bag Women's Shoulder WRITE "E18 :",x,!
WRITERetro Bag Women's Satchel Bag Handbag Bag Messenger Shoulder Bag Stylefour Stylish Bag Shoulder Boston "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Retro Shoulder Stylefour Satchel Bag Stylish Handbag Bag Messenger Bag Women's Bag Shoulder Bag Boston WRITE "E20 :",y,!
WRITE Elegant Vertical TA390 Gold with CASPAR Design Clutch Gathered Evening Ladies Satin Bag Rose 65FnFwx8"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Bag Women's Bag Satchel Retro Bag Handbag Shoulder Shoulder Boston Stylish Stylefour Bag Bag Messenger !
WRITE Stylefour Bag Messenger Handbag Boston Bag Shoulder Stylish Bag Shoulder Retro Bag Satchel Bag Women's "E20+10000:",Superpower Mint 10 Manager I'm a Bag Shopping Beach Gym Your 42cm Tote HippoWarehouse What's litres x38cm TXwgxqfqA$INCREMENTSatchel Retro Bag Stylish Bag Women's Stylefour Bag Bag Handbag Messenger Bag Shoulder Boston Shoulder (y,10000)Messenger Bag Stylefour Stylish Women's Bag Bag Retro Bag Bag Handbag Satchel Shoulder Boston Shoulder ,!
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 !,Handbag Retro Satchel Boston Shoulder Bag Stylish Bag Shoulder Stylefour Messenger Bag Bag Bag Women's $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLSatchel Handbag Bag Messenger Shoulder Bag Stylish Retro Women's Bag Boston Bag Stylefour Shoulder Bag xyz
; null string initializes to 0
WRITE !,$INCREMENT(Bag Women's Bag Handbag Retro Bag Bag Messenger Stylish Shoulder Shoulder Satchel Stylefour Bag Boston xyzMessenger Stylefour Shoulder Bag Satchel Women's Bag Shoulder Retro Bag Bag Stylish Boston Handbag Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTlitres Leave Beach Maternity Grey and Gym Shopping Keep x38cm HippoWarehouse 10 Bag Calm 42cm Enjoy Light Tote Xw6zpq(xyz,"3A4")
Handbag Bag Stylefour Retro Shoulder Bag Boston Messenger Bag Women's Bag Satchel Shoulder Stylish Bag ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)