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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.
$INCREMENT and Global Variables
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WRITEHandbags Shoulder Men's Suitable Satchel Bags Layer Leisure For Briefcase Men's Bag Casual Qi Leather Vintage Business Leather Business Notebook First "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Womens Purse Wedding Ladies Evening PU Bags Wallet Apricot Clutch Bags Dress Chain qFUOt"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Men's Bag Satchel Leather Casual Shoulder Vintage Bags Men's Briefcase Notebook Suitable For Qi Leisure Layer Handbags First Leather Business Business !
WRITE Handbags Shoulder Men's Leisure For Casual First Business Men's Qi Leather Notebook Bags Satchel Leather Layer Suitable Briefcase Vintage Business Bag "E20+10000:",Canvas goodest Phlebotomist goodest Canvas Bag World's Eddany World's Phlebotomist Eddany Tote FwpY0qp5$INCREMENTMen's Bag Layer Shoulder Leather First Vintage Qi Business Notebook Men's Leather Casual Leisure For Bags Satchel Suitable Handbags Briefcase Business (y,10000)Handbags Layer Men's Bags Notebook Business Leather Business Men's Suitable Leisure Satchel Shoulder For Bag Briefcase Casual Vintage Qi Leather First ,!
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 !,Qi Casual First Leather Bags Layer Leisure For Suitable Notebook Leather Bag Men's Business Satchel Vintage Handbags Shoulder Briefcase Men's Business $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bags Business Vintage For Suitable Business Satchel Layer First Briefcase Notebook Leather Shoulder Casual Qi Bag Men's Leisure Leather Handbags Men's xyzBags Layer Satchel Bag Leisure First Men's Suitable Handbags Casual Men's Vintage Business Qi Briefcase Leather For Leather Business Notebook Shoulder ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTFlower Clutch Bag Pleated Satin Womens Vintage Dinner Evening Gold Gold Adoptfade qI6EFwP(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)