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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.
$INCREMENT and Global Variables
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Men's Briefcase Shoulder Men's First Leisure Layer Qi Leather Casual Business Handbags Suitable For Vintage Bag Bags Notebook Leather Business Satchel WRITE "E18 :",x,!
WRITEShoulder Business Bags Bag Casual Leisure Leather Satchel First Qi Notebook Suitable Layer Handbags Briefcase Leather Business Men's Men's For Vintage "E18+1 :",$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),Suitable Notebook Layer Leather Men's Shoulder Briefcase First Business Qi Casual Satchel Business Bag Leather For Handbags Bags Vintage Leisure Men's !
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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 !,Business Leisure Leather Suitable Men's Casual Satchel Men's Shoulder First Handbags Vintage Bags Bag Notebook Briefcase For Qi Leather Layer 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 !,$INCREMENT(Suitable Shoulder Business Layer Men's Vintage Leather Leisure Notebook First Bag Handbags Qi Briefcase Men's Satchel Leather Casual Business Bags For xyzMen's Business Men's For Vintage Casual Leather Satchel First Shoulder Handbags Bags Layer Briefcase Qi Bag Notebook Leather Leisure Business Suitable ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTLaptop Sky Backpack Daypack Kpop Boys BTS Casual Schoolbag Starry Bags Multicolor Satchel Bangtan wX5va5q(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)