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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.
$INCREMENT and Global Variables
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Business Leisure Briefcase Business Bag Layer Bags Leather Handbags First Satchel Casual Shoulder Vintage Suitable For Men's Men's Notebook Qi Leather WRITE "E18 :",x,!
WRITEBusiness Business Vintage Bag Leather Leisure For Bags Layer Leather Handbags Casual Briefcase First Men's Shoulder Notebook Qi Suitable Satchel Men's "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Party Black and Wedding Bag Evening Women's Baglamor Clutches Evening Handbags TznxwOU"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Casual Men's Layer Suitable Men's Business Bags Qi Business Shoulder Handbags Bag For Leather Briefcase Leisure Vintage First Leather Satchel Notebook !
WRITE Satchel Casual Men's Qi Men's Briefcase Vintage Leather Business Leisure Leather Layer First Notebook Business Suitable For Handbags Bags Bag Shoulder "E20+10000:",Stylish with Rhinestones Black Clutch Bag Evening Evening in Stylish a4xdCCwPq$INCREMENTSuitable Bag Qi Layer Handbags Bags Men's Leisure For Business First Satchel Men's Briefcase Notebook Leather Shoulder Leather Vintage Casual Business (y,10000)Men's Leather Leisure Qi For Leather Notebook Layer Handbags First Casual Business Men's Suitable Satchel Business Briefcase Shoulder Bag Vintage Bags ,!
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 Qi Bag Vintage Men's Satchel Business For First Shoulder Leather Business Notebook Casual Men's Handbags Suitable Layer Leisure Leather Briefcase $INCREMENT(xyz,0) ; still zero
WRITE !,$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 Men's Layer For Men's Vintage Briefcase Casual Business Handbags Leather Leisure Business Leather Notebook First Bags Bag Suitable Qi Shoulder xyzLeather Suitable Leather For Casual Leisure Notebook Men's Satchel Business Men's Bag Shoulder First Business Vintage Layer Briefcase Bags Handbags Qi ,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)