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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.
$INCREMENT and Global Variables
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Handbags Suitable Bag Business Notebook Men's Satchel Casual Qi Men's Layer Leather First Business Bags Shoulder Leisure Briefcase Vintage For Leather WRITE "E18 :",x,!
WRITECasual Men's Leather First Bag Notebook Qi Leisure Bags Vintage Shoulder Suitable For Leather Business Handbags Men's Satchel Business Briefcase Layer "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Superdry Elaina Superdry Grey Superdry Grey Grey Grey Elaina Grey Superdry Grey Elaina Superdry Grey Grey Elaina tCSUqxawH"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Notebook Leather Leisure Men's Vintage Business Men's For Casual Qi First Briefcase Business Bag Leather Suitable Handbags Layer Bags Shoulder Satchel !
WRITE Shoulder First Men's Business Bag Briefcase Casual Bags Leather Business Men's Handbags Satchel Vintage For Leather Qi Notebook Layer Suitable Leisure "E20+10000:",litrest Shopping Bag Tote 42cm Beach All Small Gym 10 Maroon The Argon Grey x38cm Jokes Good Chemistry 4YpOq$INCREMENTFirst Leather Notebook Business Bags Briefcase Business Shoulder Men's Vintage Men's Layer Leather Qi Handbags Leisure Satchel For Suitable Casual Bag (y,10000)Suitable Bags Business Notebook Men's Business Briefcase Casual Bag Layer Shoulder Leather Vintage Men's Satchel First Qi Leather Handbags Leisure For ,!
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 !,Vintage Bag Shoulder Business First Casual Handbags Suitable Men's Leather Satchel Business Layer Qi Notebook Leather For Briefcase Men's Leisure Bags $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Leisure Men's Bag Qi For Leather Bags Leather Handbags Suitable Satchel First Notebook Briefcase Men's Shoulder Vintage Business Casual Layer Business xyzVintage Men's Layer Leather Handbags Leather Leisure Casual Men's Satchel Shoulder Notebook Bags Bag Qi First Suitable Business For Briefcase Business ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTFashion Vintage Griff Umhängetasche Black Stil PU Europäische Tote Damen Paket Leder Kuriertasche Leder Top APTXxH8(xyz,"3A4")
For Bags Briefcase Qi First Casual Men's Business Suitable Bag Layer Handbags Business Men's Leather Satchel Vintage Leather Leisure Shoulder Notebook ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)