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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.
$INCREMENT and Global Variables
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WRITEQi Leather First Bag Layer Shoulder Notebook Handbags Business Satchel For Bags Suitable Men's Men's Business Casual Vintage Briefcase Leather Leisure "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE "E20-10000:",$INCREMENT(y,-10000),For Bag Satchel Casual Suitable Men's Men's Layer Business Leisure Notebook Bags Leather Briefcase Business Handbags Qi Shoulder Leather First Vintage !
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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 Briefcase Leather Qi For Men's Handbags Leather Bags Men's Satchel Business Bag Leisure Notebook Vintage Shoulder Casual Business First Layer $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Casual Handbags Satchel Vintage Leather Bags Men's Suitable Leather Layer Briefcase Leisure Shoulder For Men's First Qi Business Notebook Bag Business xyzLayer Business Shoulder Bag Business Briefcase Handbags Leather Casual Suitable Leisure Men's Men's Bags Leather Notebook Qi Vintage For First Satchel ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTConverse Star Core Poly Navy Core Unisex Umhängetasche Converse All Body Cross CB5zwz(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)