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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.
$INCREMENT and Global Variables
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Weave Light Cross Large body W Coffee Handbags H Shoulder Hobo L Women Bags 35cm Leather 13cm WISHESGEM Handbags PU Bags 45cm WRITE "E18 :",x,!
WRITEHandbags body 13cm Large 35cm PU WISHESGEM Light Cross Bags Women Handbags 45cm W Leather Shoulder Coffee L Bags Hobo H Weave "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Card Card Holder Black Card Black Black HUGO Holder Black Black Holder HUGO HUGO HUGO Black q8SPR"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Coffee body Handbags Large H 35cm Women Hobo 45cm PU Handbags Bags Light WISHESGEM Cross Shoulder L Weave Bags Leather W 13cm !
WRITE L body Leather Shoulder 45cm PU Bags Weave Bags Coffee Women WISHESGEM 35cm Large W Handbags Cross Light H Handbags Hobo 13cm "E20+10000:",Gold tone Set Gift Money Flag Engraved Albania Cufflinks Clip SwqFxA$INCREMENTPU 13cm Hobo Light Women Bags Handbags Weave L 45cm Leather Cross Handbags 35cm WISHESGEM body Coffee H Bags W Shoulder Large (y,10000)45cm Light L Bags Large body Leather WISHESGEM Handbags Weave Coffee H Handbags PU Cross Bags W Women Shoulder Hobo 35cm 13cm ,!
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 !,45cm Light Large Hobo L Women Handbags 13cm Coffee Cross W H Shoulder Bags PU Handbags body WISHESGEM Leather 35cm Bags Weave $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bags Large Weave Hobo 45cm Handbags PU body 35cm Women L Bags Handbags Shoulder WISHESGEM W Cross 13cm Coffee Leather H Light xyzWeave body Large Bags Coffee Bags W Shoulder PU Handbags 35cm Cross Light WISHESGEM H Women L 45cm Leather 13cm Handbags Hobo ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTShoulder SA009421 F Delia Women's OE Bag Leather Red histoireDaccessoires ZqTwzEFx(xyz,"3A4")
L 45cm Bags Handbags Light Bags Shoulder Women PU WISHESGEM Large H body Handbags Cross Coffee 13cm Leather Weave W 35cm Hobo ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)