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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.
$INCREMENT and Global Variables
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WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE "E20-10000:",$INCREMENT(y,-10000),Men's Vintage Shoulder Business Handbags Qi First Notebook Men's Satchel Bags Bag Leisure Briefcase Leather Layer Leather Casual Suitable Business For !
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WRITE "E20+1 :",$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 !,Men's Business Notebook Suitable Bags Men's First Qi Leather Vintage Business Briefcase Bag Satchel Shoulder Leather Leisure Casual For Layer Handbags $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Men's Qi Satchel Briefcase Leisure Notebook Bags Bag Shoulder Handbags Men's Layer Business Suitable Business For Leather Vintage Leather First Casual xyzHandbags Casual Layer Men's Business Bag Qi Briefcase Satchel Vintage Shoulder Leather Suitable Leisure Business First For Bags Leather Notebook Men's ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTprotection Red men Play backpack outdoor waterproof king women folding against and hiking folded bag travel ultra scaler package shoulder leisure light pack portable water storage skin WWBzqO4(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)