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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.
$INCREMENT and Global Variables
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Briefcase For Layer Suitable First Notebook Vintage Leather Business Bag Men's Leather Handbags Men's Shoulder Leisure Business Qi Casual Satchel Bags WRITE "E18 :",x,!
WRITEHandbags Leather Leather Suitable Shoulder Business Bags Vintage Men's Satchel Briefcase Leisure Layer Qi Bag Casual Men's Notebook Business First For "E18+1 :",$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),Bags Briefcase Business Notebook Vintage Men's Shoulder Leather Leather For Suitable Handbags Business Layer Men's First Casual Qi Satchel Bag Leisure !
WRITE Vintage Leather Notebook Shoulder Leisure Qi Briefcase Layer Bags Business Leather Bag Satchel For First Casual Men's Men's Business Handbags Suitable "E20+10000:",Woman New Handbag HCFKJ Feather Gold Jacket Bag Waterproof Winter Bag Sponge Capacity Cotton Large Shoulder Padded Tote FCxZdxwq$INCREMENTBusiness First Notebook For Casual Briefcase Vintage Bags Handbags Bag Men's Layer Shoulder Leisure Satchel Qi Men's Suitable Business Leather Leather (y,10000)Suitable Men's Notebook Handbags Bags For Men's Casual Business Briefcase Layer Vintage Leather Qi Satchel Shoulder Leisure First Leather Bag Business ,!
WRITE "E20+1 :",$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 !,Qi Satchel Handbags Briefcase Casual Bags Layer Men's Business First Notebook For Shoulder Suitable Business Men's Bag Leather Leather Leisure Vintage $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Satchel Casual Bags Qi Vintage Suitable Leather Leisure Bag Men's Leather Briefcase Shoulder For Handbags Men's Business Business Notebook Layer First xyzLayer Casual Qi Handbags Satchel Leather Men's Briefcase Men's Leather First Business Leisure Bags Shoulder Suitable Notebook Vintage Business Bag For ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTWDOIT Bag Travel Shoulder Retractable Blue Bag Picking Beach 22cm Bag Children's rSqzwf68r(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)