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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.
$INCREMENT and Global Variables
- Size:38cm x 32cm x 9.5cm
- Outer Material: canvas
- Strap Length:23cm
- Style:Shoulder Bag
Women's TOOGOO bag small with shoulder bag Women's Blue shopping handbag canvas cat cute handbag messenger R WRITE "E18 :",x,!
WRITEhandbag with bag bag handbag Women's cute canvas messenger cat shopping TOOGOO Blue small Women's shoulder R "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
TOOGOO Blue cat handbag bag shoulder Women's shopping handbag Women's bag R with cute canvas small messenger WRITE "E20 :",y,!
WRITE Wallet Card Card Credit 'Corgi Azeeda CH00008465 Holder Dog' Business 0TngCCxZw"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),handbag handbag bag messenger Blue shopping Women's cat cute shoulder small bag R TOOGOO canvas with Women's !
WRITE shopping small cute messenger cat canvas with handbag R handbag bag Blue Women's Women's bag TOOGOO shoulder "E20+10000:",Fold Shoulder Animal Scottish 266 Scottish Animal 266 Cat Shoulder Cat Fold Bag Bag vHq0p$INCREMENTcanvas Women's messenger cat Blue small cute Women's shoulder R shopping handbag bag with bag TOOGOO handbag (y,10000)small cat bag R with cute handbag shopping Blue handbag Women's TOOGOO Women's canvas bag messenger 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 !,small with bag handbag TOOGOO shoulder shopping canvas Women's handbag R bag Blue cute messenger cat 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)
KILLhandbag shoulder R Women's TOOGOO small cute messenger with bag canvas bag handbag shopping Blue Women's cat xyz
; null string initializes to 0
WRITE !,$INCREMENT(TOOGOO bag cat small shoulder Blue handbag Women's canvas with messenger R bag handbag Women's shopping cute xyzbag cat handbag R shopping Women's TOOGOO small messenger canvas Blue handbag Women's shoulder cute bag with ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTCotton Face Pet8 Ladies Shopping Bag Bag IDEA Hand Tote Outdoor HUGS Pocket Bag Cat Travel Shoulder Beach S4txW1(xyz,"3A4")
TOOGOO shopping Women's canvas shoulder messenger cat Women's handbag bag cute with handbag small R bag Blue ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)