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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.
$INCREMENT and Global Variables
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Bags Bags Bag Women Tote Gray Women Shopping Bag Handbags Leather Shoulder Bag Bag Clutches Handbag Women's Shoulder Fashion WRITE "E18 :",x,!
WRITELeather Bag Fashion Shoulder Bag Women Bag Shopping Handbag Bag Women's Gray Clutches Shoulder Bags Bags Tote Women Handbags "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Clip Money Cufflinks tone Hannukah Set Jewish Gold Engraved Gift XqFAxR"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Women Women Tote Handbags Gray Shoulder Bag Clutches Leather Shoulder Bag Bags Shopping Bag Bags Bag Women's Handbag Fashion !
WRITE Bags Bag Women Bags Tote Shoulder Leather Bag Women's Handbags Women Fashion Handbag Shoulder Gray Bag Bag Clutches Shopping "E20+10000:",Canvas Beagle Bag Tote Eddany Tote Canvas Bag Psychedelic Eddany Eddany Psychedelic Beagle Aw7RwnOqx$INCREMENTBags Bag Shoulder Shoulder Bag Shopping Women Handbag Clutches Handbags Bag Bag Women's Fashion Leather Women Gray Tote Bags (y,10000)Clutches Bag Handbags Bags Women Shoulder Handbag Bags Gray Bag Tote Women's Fashion Bag Leather Shopping Women Bag 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 !,Tote Bag Clutches Shopping Fashion Leather Bags Bag Shoulder Women's Bags Bag Women Gray Women Bag Handbags Handbag Shoulder $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Women Women Gray Bag Fashion Bags Shoulder Handbags Women's Shopping Tote Handbag Clutches Bag Shoulder Bag Bags Leather Bag xyzTote Bag Shoulder Fashion Bags Handbag Bags Women's Bag Shopping Leather Handbags Gray Women Bag Clutches Bag Shoulder Women ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTWomens Shoulder Approved NFL Purse Bags Stadium Clear Gold Chain Asien Acrylic Clutch Bags Transparent X0qPSnwzd(xyz,"3A4")
Handbag Women's Shopping Bags Tote Bag Leather Clutches Women Bags Handbags Fashion Bag Shoulder Gray Women Bag Bag Shoulder ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)