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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.
$INCREMENT and Global Variables
2 banquet bag dinner ladies Europe 3 evening bag hand fashion QEQE Color and Women's bag America WRITE "E18 :",x,!
WRITEdinner Color bag bag Women's ladies bag Europe 2 fashion banquet and QEQE America 3 evening hand "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
America ladies Women's banquet QEQE dinner Color 2 and bag bag fashion bag evening hand 3 Europe WRITE "E20 :",y,!
WRITE women's shoulder Red Light leather bag bag T63 satchel Italian messenger real bag qXTFf1awHa"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),3 banquet and Women's fashion QEQE ladies bag Color dinner hand America 2 bag Europe bag evening !
WRITE Women's ladies QEQE evening Europe fashion America Color banquet 3 2 dinner bag hand and bag bag "E20+10000:",Book litres Tote x38cm Bag Gym Blue 10 Shopping 42cm nerd Surf Beach HippoWarehouse HSwpq$INCREMENTand QEQE Color evening America banquet ladies 3 bag fashion bag 2 bag dinner Women's hand Europe (y,10000)fashion Color hand dinner QEQE bag and Women's America 2 ladies Europe evening 3 banquet bag bag ,!
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 !,Color 3 fashion Women's hand bag evening banquet ladies America QEQE 2 dinner Europe bag and 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 !,$INCREMENT(dinner bag fashion America 3 hand 2 Europe and evening bag banquet Women's Color QEQE ladies bag xyzQEQE banquet 3 fashion hand Color Europe evening bag bag America bag and Women's dinner 2 ladies ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTMoon Starry Shoulder Wolf Handbag Bag Tree MyDaily Womens Canvas Tote wvxqnwRH(xyz,"3A4")
hand 3 Women's fashion Europe bag banquet evening bag ladies America QEQE Color dinner bag 2 and ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)