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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.
$INCREMENT and Global Variables
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Shoulder Casual Leather Men's Bag Handbags Men's Satchel Leather Business For Suitable Bags Notebook Business Vintage Qi Leisure First Layer Briefcase WRITE "E18 :",x,!
WRITELeather Layer Satchel Leisure Handbags First Bags For Qi Business Shoulder Briefcase Leather Men's Men's Bag Business Casual Suitable Notebook Vintage "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE 26 Canvas Litres Mill Bag Westford Black Shopper Classic Mill Westford q0xfwZtR"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Satchel Men's Bags Bag Layer Leather Men's Casual For Leisure First Leather Business Shoulder Briefcase Business Suitable Vintage Qi Notebook Handbags !
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WRITE "E20+1 :",$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 !,Casual First Bags Layer Men's Suitable Leather Qi Shoulder Business Vintage Bag Business Handbags Leisure Men's Notebook For Briefcase Leather Satchel $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Vintage Shoulder Briefcase Men's Leisure Bag For Suitable Business Casual Men's First Handbags Leather Layer Qi Business Notebook Leather Bags Satchel xyzSatchel Bag Leather Layer Leisure Handbags Leather Business Men's Business Suitable Notebook Bags Casual First For Qi Shoulder Vintage Briefcase Men's ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTStrap Landscape Nature Picnic Island Rock for Shoulder Lunch Bag Lunchbox Cooler Dawn vE5qHxaw(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)