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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.
$INCREMENT and Global Variables
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WISHESGEM Weave Bags PU Light 45cm body Coffee Women W 35cm Handbags Hobo H Leather Shoulder Bags Large L Handbags 13cm Cross WRITE "E18 :",x,!
WRITEHandbags Coffee 35cm Women 13cm Bags L Hobo W Weave Leather WISHESGEM Shoulder 45cm body PU Cross Bags Handbags H Light Large "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Kate Bag Banksy Banksy Shoulder Black Moss Tote Kate RREvY"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Women Bags WISHESGEM Shoulder W Light Leather body Weave Handbags Bags Large Coffee H PU Cross 35cm Handbags Hobo 45cm L 13cm !
WRITE Cross 13cm body Shoulder Leather Weave Large Handbags L Light W H Bags Coffee WISHESGEM Handbags 45cm Hobo PU Bags 35cm Women "E20+10000:",Shoulder Bag Oil Shopper Floral Cloth Ladies Tote Flower Owl Pink Dusty X1262 rwqO0RYw$INCREMENTHandbags Bags H Light Bags PU Large 45cm Cross Women body Leather W WISHESGEM Weave 13cm Handbags Hobo L Coffee 35cm Shoulder (y,10000)Coffee Women PU 45cm WISHESGEM Handbags 13cm Handbags Light body Bags Leather Large H W Shoulder Cross L Hobo 35cm Weave Bags ,!
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 !,Weave H Coffee Bags PU Light W Leather Hobo 45cm 35cm 13cm Handbags Women Cross Bags Shoulder body WISHESGEM L Large 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 !,$INCREMENT(W body Women Bags PU L 13cm Handbags Bags Light Leather 45cm Large Coffee Handbags 35cm Cross WISHESGEM Hobo H Weave Shoulder xyzW Bags Weave L PU WISHESGEM Light Women H body Shoulder Coffee Handbags Hobo Leather 35cm Handbags 13cm Large 45cm Bags Cross ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTMini Bull Gift Terrier Colours Bag Choice Blue Dog English Terrier Shoulder of Bull Reporter Bag White 0ExYEg(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)