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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.
$INCREMENT and Global Variables
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Bag Bags Shoulder Bag Clutches Women Handbag Gray Women Shoulder Bag Bag Shopping Women's Bags Fashion Leather Tote Handbags WRITE "E18 :",x,!
WRITEShoulder Shopping Leather Handbags Bag Women Handbag Women Bags Gray Bag Shoulder Bag Bags Tote Women's Fashion Bag Clutches "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Handbag Women LILYYONG Shoulder Bag Pink Bag Bag Bucket Bag Crossbody Tote xXBBnO7f"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Women Bags Women Bags Fashion Women's Handbags Shoulder Tote Bag Bag Bag Gray Handbag Leather Clutches Shopping Bag Shoulder !
WRITE Women Gray Shoulder Tote Bag Bag Fashion Bag Handbag Clutches Shopping Bag Bags Handbags Leather Women's Shoulder Bags Women "E20+10000:",Zipper Pocket Tote Black THEE Bag Inner Beach Rope with with Handles Iqf47gw$INCREMENTLeather Bags Shoulder Bag Handbags Tote Shopping Bag Bag Women Handbag Fashion Gray Women Shoulder Women's Bags Bag Clutches (y,10000)Shoulder Shopping Bags Tote Women Bag Handbag Clutches Bag Bag Fashion Shoulder Leather Bag Women Handbags Women's Bags Gray ,!
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 !,Bags Shoulder Bag Gray Handbag Shopping Clutches Bags Shoulder Tote Leather Women's Women Women Fashion Bag Bag Bag Handbags $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Women Shopping Handbag Tote Bag Bags Bag Fashion Leather Shoulder Women's Bags Bag Gray Handbags Clutches Bag Shoulder Women xyzBags Clutches Gray Leather Shoulder Tote Bag Handbag Bag Women's Bags Bag Handbags Shopping Women Women Shoulder Fashion Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTDress Ladies Wallet Blue Chain Womens Purse Party Clutch Wedding Evening Bags Bags Shoulder xnHF0(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)