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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.
$INCREMENT and Global Variables
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Bags Fashion Women Clutches Bag Shoulder Leather Women Shopping Women's Bags Gray Bag Handbag Bag Handbags Shoulder Tote Bag WRITE "E18 :",x,!
WRITEBag Bag Bag Women Bags Shoulder Clutches Women's Bag Fashion Women Shoulder Handbag Handbags Bags Gray Shopping Leather Tote "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Idakoos Bluegrass Tote Time style Bag Canvas I Old love chalk Music qITwqr"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Shoulder Shoulder Shopping Bag Bags Gray Leather Women Tote Women Clutches Handbags Bag Fashion Bag Handbag Bag Bags Women's !
WRITE Women Shoulder Tote Handbags Shoulder Bags Bag Bag Women's Women Bags Bag Shopping Gray Leather Handbag Bag Fashion Clutches "E20+10000:",Bags Leather Faux Ladies Prom Evening Clutch Hand Womens Blue Party Light Occasion Quilted M5 Dressy UPSxwqF$INCREMENTBag Fashion Shoulder Clutches Women's Gray Bag Tote Women Women Handbags Bags Bags Shopping Bag Bag Shoulder Leather Handbag (y,10000)Bag Tote Women Women's Bags Bag Fashion Women Clutches Handbags Bag Shoulder Shoulder Handbag Bag Bags Leather Shopping Gray ,!
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 !,Bag Fashion Shoulder Clutches Bag Women Gray Shopping Tote Bag Handbags Bags Shoulder Leather Bags Bag Women's Handbag Women $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bag Bag Bags Bags Women's Shopping Fashion Gray Bag Shoulder Women Women Handbag Clutches Bag Leather Tote Shoulder Handbags xyzGray Bag Bags Women's Leather Clutches Shoulder Women Handbag Bag Shopping Tote Shoulder Women Bags Bag Fashion Handbags Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTErgo Daypack 42 FIDLOCK Casual Ergonomic Backpack Sweet liters Sweet Schulranzen cm Anekke Multicolour 23 SAqwfdS(xyz,"3A4")
Bags Leather Clutches Women Bag Gray Handbags Shopping Fashion Women's Bag Women Shoulder Bag Tote Bags Shoulder Handbag Bag ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)