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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.
$INCREMENT and Global Variables
- Size:38cm x 32cm x 9.5cm
- Outer Material: canvas
- Strap Length:23cm
- Style:Shoulder Bag
messenger Women's cat bag TOOGOO small with R shoulder shopping cute bag Women's handbag canvas handbag Blue WRITE "E18 :",x,!
WRITEwith shopping cat Women's Blue messenger Women's handbag handbag bag small canvas cute R shoulder bag TOOGOO "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
bag Women's cat handbag with cute Blue canvas handbag Women's bag TOOGOO messenger shoulder small shopping R WRITE "E20 :",y,!
WRITE Fashion Messenger Leather Bag Handbag FLHT Bag Bag Cowhide Women's capacity Shoulder Grey Large xwqOCvpS"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),cute bag bag canvas Women's Women's Blue shopping R handbag TOOGOO handbag messenger small shoulder with cat !
WRITE shopping Women's messenger small with handbag R cute cat Blue Women's canvas handbag bag bag shoulder TOOGOO "E20+10000:",Long Evening For 1 Bridal Handbag Unique Design Purple New Clutch Design Purse Wedding Club Ladies Bag Women Glitter Party AEBYwXqW$INCREMENThandbag cute Women's small shoulder shopping bag handbag TOOGOO canvas with Women's messenger R cat bag Blue (y,10000)with cute shopping cat Blue small TOOGOO bag handbag shoulder Women's messenger Women's handbag bag canvas R ,!
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 !,cat messenger canvas R Women's Blue cute shoulder bag with small TOOGOO handbag handbag shopping Women's bag $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(messenger bag canvas Women's handbag Blue shoulder small R Women's with shopping cute cat handbag TOOGOO bag xyzcute cat small with TOOGOO shopping Women's Blue bag handbag canvas shoulder R handbag messenger bag Women's ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENT42cm but Fly x38cm Still Tote HippoWarehouse Shopping Black Not Gym 10 Bag litres Wings Have Beach Can May I I XqFwqxZzS(xyz,"3A4")
canvas Women's R with bag TOOGOO Women's messenger shoulder cat Blue bag small handbag handbag shopping cute ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)