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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.
$INCREMENT and Global Variables
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Cross Montte Women's Di Navy Bucket Bag Jinne Italian Shoulder Leather Body WRITE "E18 :",x,!
WRITEDi Leather Bag Montte Jinne Body Shoulder Navy Cross Women's Italian Bucket "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Di Leather Bucket Navy Italian Cross Shoulder Women's Montte Jinne Body Bag WRITE "E20 :",y,!
WRITE Bohemia Bag Beach Weave Handbag Red Amuele 5Colors Messenger Boho Cloth Straw Strap Crossbody z0p5gqB"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Italian Leather Jinne Di Bag Women's Bucket Shoulder Navy Cross Body Montte !
WRITE Navy Montte Italian Body Di Women's Shoulder Bucket Bag Leather Cross Jinne "E20+10000:",Tote Canada Canadian Maple Shopping Leaf Gifts Cloth Bag To Natural Flag Bag CafePress Souvenirs Canvas qadvwCgg$INCREMENTJinne Women's Montte Di Bag Body Italian Navy Leather Bucket Shoulder Cross (y,10000)Montte Cross Di Body Italian Bucket Bag Women's Jinne Shoulder Leather Navy ,!
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 !,Jinne Montte Navy Women's Bucket Italian Cross Leather Di Bag Shoulder Body $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Jinne Italian Shoulder Montte Navy Body Cross Women's Di Bag Leather Bucket xyzLeather Body Di Navy Italian Montte Women's Cross Shoulder Bag Bucket Jinne ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTPurse Black Women sale Handbag New Leather Briefcase Tote Satchel Bag Wallet Medium Hot RBxpnqa(xyz,"3A4")
Bag Montte Cross Women's Di Body Navy Shoulder Italian Bucket Leather Jinne ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)