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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.
$INCREMENT and Global Variables
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Coffee 35cm Cross L Weave Bags Light Shoulder Hobo W Handbags 13cm PU Handbags 45cm WISHESGEM H body Leather Bags Women Large WRITE "E18 :",x,!
WRITEHandbags Coffee 45cm Bags Hobo Handbags WISHESGEM Leather Shoulder body PU W Light L Women 35cm Bags Cross Large Weave 13cm H "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Louis Forvert Forvert Ripstop Ripstop Backpack green Louis Green Backpack qwt4SXE"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Leather 45cm Light Handbags Large Cross Hobo W 35cm Weave Bags Handbags Coffee WISHESGEM body L Women Shoulder 13cm H PU Bags !
WRITE Bags WISHESGEM PU Hobo Bags Shoulder Cross Handbags L Leather W H Handbags Women Light 35cm body Coffee 13cm 45cm Weave Large "E20+10000:",Bag Cross HUGO Black 50397593 Women’s Body 50397593 Cross Bag Women’s HUGO Body AZUO4O$INCREMENTCoffee Light H PU Bags W Hobo Women 13cm Handbags body Handbags Shoulder Weave Cross 45cm Bags 35cm Leather Large L WISHESGEM (y,10000)Bags 45cm Weave PU Women Coffee Shoulder Handbags 13cm L Handbags Large Light WISHESGEM W body Bags 35cm Cross Leather H Hobo ,!
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 !,35cm PU Weave Handbags H Light Bags Coffee W Hobo WISHESGEM Women Shoulder body 45cm Handbags L Leather Large 13cm Bags Cross $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(13cm L Handbags 35cm PU Handbags H Hobo Shoulder 45cm Cross Large Coffee W Bags Light Bags Women WISHESGEM Leather Weave body xyzHandbags Women 35cm W 45cm PU H Bags Leather body Hobo WISHESGEM Bags Cross Coffee Light Handbags Large Shoulder L 13cm Weave ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTPrimula Women’s Satchel Beige Blu Tosca Tosca Blu Ivory qIxwHZUx(xyz,"3A4")
Bags WISHESGEM Coffee Handbags Weave Light H body 13cm Bags Shoulder Handbags Leather Large L 35cm PU W Cross Women 45cm Hobo ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)