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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.
$INCREMENT and Global Variables
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Handbags Handbag Leather Clutches Bags Shoulder Shopping Bags Fashion Women Gray Tote Bag Bag Women's Bag Bag Women Shoulder WRITE "E18 :",x,!
WRITEShopping Bags Shoulder Handbags Handbag Bag Leather Tote Bag Women's Bag Fashion Clutches Shoulder Gray Women Bags Women Bag "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Hand VP024 Backpack Ladies Shoulder Pelle Linen Women Bag Bag Tote Leather Navy Clutch Convertible Vera Girls Galaxy OEx4PPwqnB"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Bag Shopping Gray Bag Shoulder Tote Bag Clutches Bags Handbags Women Bags Women's Handbag Shoulder Fashion Women Leather Bag !
WRITE Gray Bag Leather Shopping Women Handbag Bags Fashion Bag Bags Shoulder Women Clutches Women's Shoulder Bag Tote Handbags Bag "E20+10000:",Royal Cross Women's 324 Bag Kisslock Sequin Bags Body LeahWard Evening Small Clutch SvPqwWCCn$INCREMENTWomen Leather Shoulder Bags Gray Clutches Shoulder Bag Handbag Handbags Bag Shopping Women Bags Fashion Tote Bag Women's Bag (y,10000)Fashion Bag Bags Handbag Bags Gray Tote Bag Clutches Handbags Bag Women Shoulder Women Leather Women's Bag Shopping 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 !,Leather Bag Women's Bag Women Bags Shoulder Clutches Bag Gray Fashion Bag Bags Handbag Tote Shoulder Shopping Handbags Women $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bag Handbags Women's Shoulder Bags Clutches Leather Shopping Fashion Handbag Bag Gray Bags Bag Women Shoulder Tote Women Bag xyzBag Handbag Tote Bags Bag Clutches Women's Shoulder Fashion Bags Women Handbags Shopping Leather Bag Bag Shoulder Women Gray ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBond Cufflinks Clip Set James Turquoise Box Money Silver Round Sterling npx7gqX4p(xyz,"3A4")
Women Bag Handbag Tote Clutches Shoulder Women Leather Fashion Shopping Handbags Bag Gray Women's Bags Shoulder Bags Bag Bag ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)