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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.
$INCREMENT and Global Variables
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Weave Hobo Leather body 13cm Handbags WISHESGEM Coffee Bags H 35cm Bags Large Handbags PU Women L 45cm Cross Light W Shoulder WRITE "E18 :",x,!
WRITEH Bags W Light Shoulder L Weave Large Bags 45cm Cross Women PU Handbags body Hobo 13cm Handbags Coffee 35cm WISHESGEM Leather "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Bags Leather 45cm H 35cm WISHESGEM Women W Large Hobo Weave L Handbags body Shoulder 13cm Handbags PU Light Coffee Cross Bags WRITE "E20 :",y,!
WRITE School School Women Red Bag Travel Bag Galaxy Girls Backpack Red IwUCnHqqxP"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Light Bags Coffee L W 35cm body Handbags Large Leather Bags Hobo 45cm Women Cross Weave WISHESGEM Shoulder H Handbags 13cm PU !
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WRITE "E20+1 :",$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 !,Handbags Cross Light 45cm Shoulder W H 13cm WISHESGEM body Coffee 35cm Leather Handbags Large L Hobo Weave Bags PU Bags Women $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(35cm WISHESGEM Women body Bags Handbags Shoulder Coffee Cross Large 13cm Weave L Bags Leather Hobo PU H Handbags 45cm Light W xyzWeave WISHESGEM PU body L Hobo H Women Handbags Shoulder Bags Large Leather Cross W 45cm 13cm 35cm Light Handbags Bags Coffee ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBlack Bag Compartment Cross Multi Womens Shoulder Pattern Body Messenger Blue Small Snakeskin vqHpw1Bpf(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)