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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.
$INCREMENT and Global Variables
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L body Leather W Cross Hobo 35cm 13cm WISHESGEM Large Handbags Weave H Women Bags Handbags PU 45cm Shoulder Bags Coffee Light WRITE "E18 :",x,!
WRITEL Hobo Coffee Handbags Cross WISHESGEM Women Bags Leather 13cm Large H PU body 35cm 45cm Weave W Light Shoulder Handbags Bags "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Female Tassel Body Green Tassel Ladies Bag Bag Cross Shoulder PU Bag New Retro 5RqY4A"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),13cm Handbags Women Bags WISHESGEM Light Shoulder PU W Bags Leather 35cm Weave Handbags 45cm Hobo Large H body L Coffee Cross !
WRITE Bags 45cm W Leather 35cm H Handbags L body Cross WISHESGEM Handbags Light Large Shoulder 13cm PU Women Weave Bags Coffee Hobo "E20+10000:",Shoulder Promo Bag Tote Carry Womens Mill sunflower Cotton Westford OnIxgIaqwR$INCREMENT13cm Bags H WISHESGEM Bags Handbags Shoulder PU 35cm Light Women Cross L Coffee Hobo Handbags Large W body Weave Leather 45cm (y,10000)35cm Cross Bags Large Coffee Shoulder Handbags W body Light Bags L Hobo 45cm Weave Handbags PU WISHESGEM Women Leather 13cm H ,!
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 !,Hobo 13cm 35cm Leather Handbags Cross Weave Bags W Light 45cm Large Women H Bags PU Handbags body L WISHESGEM Shoulder Coffee $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(WISHESGEM Women Handbags Bags 13cm H Leather Shoulder Cross Light L 35cm W Hobo Coffee Weave PU Large body Bags Handbags 45cm xyz45cm Weave 35cm Cross Handbags WISHESGEM Handbags H W L Large body Light PU Bags Coffee Leather Bags Shoulder 13cm Hobo Women ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTJack One Georges Fold Red Tri Jack Black Georges Size BZycW7565O(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)