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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.
$INCREMENT and Global Variables
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WRITEMen's Notebook Leather Business Handbags First Leather Shoulder Suitable Satchel Business Briefcase For Bag Leisure Casual Layer Vintage Men's Qi Bags "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Oxblood Caravan Nylon Wallet Wallet Wallet Oxblood Nylon Nylon Caravan Caravan Oxblood OqwqxP8SZX"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Men's Men's Briefcase For Vintage Qi Suitable First Business Bags Business Notebook Handbags Satchel Leather Shoulder Layer Leather Bag Casual Leisure !
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WRITE "E20+1 :",$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 Vintage First Bag Satchel Handbags Shoulder Bags Layer Leather Leisure Casual Briefcase For Notebook Men's Men's Business Qi Suitable Leather $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bags Handbags Business First Shoulder Leather Briefcase Suitable Satchel Business Men's Notebook Bag Leather Leisure For Layer Men's Casual Qi Vintage xyzVintage First Suitable Leather Leisure Men's Handbags Bags Bag Notebook Business Casual For Briefcase Qi Business Shoulder Leather Layer Men's Satchel ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTLondon Brown Leather Real J Shoulder Nappa Ladies Everyday Reddish Work Crossover WILSON Genuine body Handbag Satchel Women Travel iPad Designer Bag Cross Handmade qxwff5gSn(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)