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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.
$INCREMENT and Global Variables
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Briefcase Casual Business Satchel Men's For Men's Layer Business First Leather Handbags Shoulder Vintage Suitable Bags Bag Notebook Leather Qi Leisure WRITE "E18 :",x,!
WRITELeather Men's Qi Leather Business Bags Vintage Layer Handbags Bag Briefcase For Suitable Men's Casual Shoulder Notebook Business First Satchel Leisure "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Mens Recon North Grey Face Yellow The Turbulence Backpack Acid xwZTqv"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Suitable Bag Casual Briefcase Leather Men's Handbags Business Satchel Leisure Shoulder Men's For Bags Qi Vintage Business Notebook First Leather Layer !
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WRITE "E20+1 :",$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 !,Men's Business Bags Qi Satchel Business Leather First Leather Casual Handbags Shoulder Layer For Suitable Vintage Briefcase Men's Notebook Bag Leisure $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(For Men's Leather Leisure Layer Bag Qi Casual First Men's Shoulder Leather Notebook Bags Business Briefcase Business Suitable Satchel Handbags Vintage xyzBusiness Bag Vintage Qi Shoulder Men's Business Layer For Suitable Men's Bags Satchel Briefcase First Handbags Leather Casual Leisure Leather Notebook ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTThaishop Ariyas cotton bowtie Ariyas with handbag lady made lady handbag Thaishop of wAttUxqIT(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)