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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.
$INCREMENT and Global Variables
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Bags Casual Vintage Layer Qi Leisure Leather Shoulder Business Men's Notebook Men's For Leather First Briefcase Bag Satchel Business Handbags Suitable WRITE "E18 :",x,!
WRITEFirst Business Vintage Qi Leisure Business Briefcase For Leather Casual Suitable Bags Layer Men's Shoulder Notebook Handbags Men's Leather Satchel Bag "E18+1 :",$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),Shoulder Bags Business For Handbags Leather Briefcase Vintage Satchel Notebook Suitable Leather Business Bag First Layer Qi Casual Men's 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 !,Bags Satchel Notebook Vintage Shoulder Men's Handbags Men's Business Leisure For Bag Casual Leather Layer Leather First Suitable Briefcase Qi 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 !,$INCREMENT(Leather Leisure Satchel Layer Notebook Business Vintage Suitable Business Bags Qi Shoulder Handbags Men's Briefcase Leather Casual Bag Men's First For xyzVintage First Briefcase Men's Notebook Leather Satchel For Leather Leisure Men's Layer Business Bags Bag Suitable Qi Business Casual Handbags Shoulder ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBAG WOMAN BAG BAG POLLINI WOMAN WOMAN BAG WOMAN BAG POLLINI POLLINI POLLINI CECdqxwrA(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)