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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.
$INCREMENT and Global Variables
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Suitable Casual First Leather Notebook Vintage Shoulder Men's Handbags Bag Leisure For Briefcase Men's Layer Bags Qi Business Satchel Leather Business WRITE "E18 :",x,!
WRITEBriefcase Business For Men's Shoulder Casual Satchel Bag First Notebook Qi Leather Leisure Layer Business Men's Handbags Suitable Bags Leather Vintage "E18+1 :",$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),Men's First Briefcase Qi Layer Men's Leisure Leather Shoulder Casual Business Bag Leather Handbags Suitable Business Satchel Bags Vintage For Notebook !
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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 !,Qi Leather Suitable Bags Men's Business Men's Satchel Handbags Business Briefcase Vintage For Leather Bag Casual Shoulder Layer First Notebook Leisure $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bag Vintage Leisure Bags Business Layer Qi Suitable For Notebook Men's Shoulder Casual Leather Handbags Men's Satchel Business Briefcase First Leather xyzLeather Bag Business Casual Briefcase Leisure Qi Satchel Handbags Notebook Layer Bags Shoulder Suitable Leather Vintage Men's Business For Men's First ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTEUzeo Backpack Wet Pool Waterproof Swim Green Dry Swimming and Drawstring Separation rqzfr(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)