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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.
$INCREMENT and Global Variables
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Ladies Capacity Retro Shoulder Coffee FangYOU1314 Portable Leather Red Soft Color Messenger Oil Large Waterproof Bag Shoulder WRITE "E18 :",x,!
WRITERed Leather Large Oil Portable Shoulder Retro Coffee FangYOU1314 Waterproof Ladies Soft Capacity Messenger Shoulder Bag Color "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Color Ladies Shoulder Messenger Shoulder Oil Soft Leather Large Capacity Retro FangYOU1314 Bag Red Waterproof Portable Coffee WRITE "E20 :",y,!
WRITE Tote Women Bags CW435 Handbags Holiday School Women's For A4 Nice White Fashion Bag LeahWard Cream For Shoulder q8EwBx"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),FangYOU1314 Bag Ladies Shoulder Leather Color Large Oil Soft Retro Portable Waterproof Capacity Messenger Coffee Red Shoulder !
WRITE Color Messenger Waterproof Large Coffee Red Shoulder Leather Shoulder Capacity Ladies Bag Retro Portable Soft FangYOU1314 Oil "E20+10000:",Rivet Vintage Gray Shoulder Aediea Buckle Bag Crossbody Women PU Leather qwAwFPIv7$INCREMENTRetro Large Soft Color Shoulder Shoulder FangYOU1314 Oil Messenger Coffee Leather Portable Ladies Red Waterproof Capacity Bag (y,10000)Leather Coffee Bag Shoulder Retro Capacity Ladies Red FangYOU1314 Oil Messenger Soft Shoulder Portable Waterproof Color Large ,!
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 !,Retro Ladies Large Messenger FangYOU1314 Shoulder Soft Capacity Shoulder Bag Leather Color Waterproof Red Coffee Oil Portable $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Large Capacity Red Messenger Oil Bag Leather Soft Coffee Color Ladies Portable Waterproof Retro Shoulder FangYOU1314 Shoulder xyzLeather Messenger Soft Color Shoulder Large Portable FangYOU1314 Bag Coffee Red Oil Shoulder Ladies Retro Waterproof Capacity ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTMet Multicolour Black Black Casual Daypack Multicolour Daypack L Met L 23 Eastpak 23 Eastpak Casual q6gq7OwcA(xyz,"3A4")
Retro FangYOU1314 Messenger Shoulder Shoulder Capacity Portable Oil Coffee Ladies Color Red Leather Large Bag Soft Waterproof ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)