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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.
$INCREMENT and Global Variables
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Bags Notebook Leisure Satchel First Layer For Shoulder Leather Leather Vintage Business Handbags Qi Briefcase Bag Casual Suitable Business Men's Men's WRITE "E18 :",x,!
WRITESuitable Handbags Casual Briefcase Shoulder Men's Satchel Business Bags For Bag Qi Business Leather First Leisure Notebook Men's Layer Leather Vintage "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE "E20-10000:",$INCREMENT(y,-10000),Satchel First For Suitable Leather Vintage Leisure Qi Layer Men's Handbags Casual Briefcase Leather Notebook Business Bags Business Men's Bag Shoulder !
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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 !,Suitable Bags Business Men's Notebook Qi Briefcase Layer For Vintage Bag Business Leather Shoulder Handbags Leisure First Men's Satchel Casual Leather $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Men's Bags Business Notebook Qi Bag First Layer Business Briefcase Leather Satchel Leather For Casual Suitable Leisure Vintage Shoulder Men's Handbags xyzHandbags Notebook Suitable Business First Men's Briefcase Bag Leisure Shoulder Men's Business Layer Leather Satchel Casual Vintage Leather For Bags Qi ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTInner Pocket with THEE Zipper with Navy Rope Blue Handles Bag Beach Tote Canvas qxggSZTA(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)