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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.
$INCREMENT and Global Variables
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Bag Women's Fashion Leather Clutches Handbag Shoulder Women Bags Bag Gray Bag Handbags Shoulder Women Bag Bags Shopping Tote WRITE "E18 :",x,!
WRITEWomen's Clutches Women Handbags Leather Bags Bag Fashion Handbag Tote Bag Women Bag Shoulder Bag Gray Shopping Bags Shoulder "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Women's Handbags Shoulder Bags Gray Shopping Bag Fashion Women Bags Leather Tote Bag Bag Handbag Shoulder Bag Women Clutches WRITE "E20 :",y,!
WRITE Clutch Nr Silber Women's Surepromise 2 Surepromise Women's w1Z8qx4fZ"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Bag Gray Women's Bag Leather Women Shoulder Clutches Tote Bags Shopping Shoulder Bags Bag Handbags Women Handbag Fashion Bag !
WRITE Shopping Bag Bag Women's Fashion Bag Handbags Tote Bags Bags Shoulder Women Gray Clutches Shoulder Leather Women Bag Handbag "E20+10000:",Women Pearl Handbag Clutches Party Wedding Purses Cocktail Beaded Evening Flower for Pink ExrXCwqE5$INCREMENTFashion Clutches Gray Bags Bags Shopping Shoulder Women Bag Handbags Tote Women Bag Handbag Bag Shoulder Leather Bag Women's (y,10000)Bag Women Handbags Women Leather Clutches Bag Bags Shoulder Handbag Gray Women's Fashion Shoulder Bag Bag Shopping Tote Bags ,!
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 !,Handbags Bags Women's Clutches Bag Bag Shoulder Bag Shopping Shoulder Bag Leather Women Fashion Handbag Women Bags Tote Gray $INCREMENT(xyz,0) ; still zero
WRITE !,$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 Leather Shoulder Bag Shoulder Women Shopping Tote Clutches Bag Women's Bags Bag Fashion Bag Bags Gray Handbags Women xyz
; null string initializes to 0
WRITE !,$INCREMENT(Handbags Bags Bag Fashion Shoulder Clutches Bags Women's Bag Bag Bag Women Tote Gray Shopping Leather Women Shoulder Handbag xyzHandbag Women's Bag Shoulder Gray Women Bags Shopping Bag Shoulder Bags Women Leather Bag Tote Clutches Fashion Handbags Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTOutdoor Unisex Hiking Black Backpack Dayton Jack Hiking Wolfskin Wolfskin Jack Dayton Outdoor Unisex z7AUwg8qB(xyz,"3A4")
Handbag Bags Bag Clutches Bag Bag Handbags Bags Bag Gray Women Women's Tote Shopping Fashion Shoulder Leather Shoulder Women ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)