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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.
$INCREMENT and Global Variables
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Leisure First Business For Suitable Men's Handbags Vintage Notebook Layer Business Shoulder Briefcase Bag Men's Qi Leather Satchel Casual Leather Bags WRITE "E18 :",x,!
WRITELeather Briefcase Suitable Bags For Qi Notebook Bag Satchel Men's Leisure Men's Leather Vintage Handbags Business Layer Shoulder Business First Casual "E18+1 :",$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),Notebook Shoulder Casual Qi Briefcase Business Men's Leisure Suitable Business Vintage Bags First For Bag Satchel Handbags Leather Men's 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 !,Leisure Leather Business Bag Layer Business Suitable Casual For Handbags Shoulder Men's Briefcase Vintage Notebook Satchel Men's First Qi Leather Bags $INCREMENT(xyz,0) ; still zero
WRITE !,$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(Qi Handbags Leather Bags Leather First Business Notebook Suitable Vintage Men's Satchel Casual Business Shoulder Briefcase Layer Men's For Leisure Bag xyzBriefcase Satchel Business Layer Suitable Vintage Leather Bag Bags Qi Shoulder Casual Leisure Business Men's Leather Handbags First Men's Notebook For ,2)
; increments by 2
; null string increments by 0 (xyz=2)
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)