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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.
$INCREMENT and Global Variables
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Women L Bags Shoulder Bags Large H W Leather Hobo Handbags Weave WISHESGEM PU 45cm Coffee body Light 13cm 35cm Cross Handbags WRITE "E18 :",x,!
WRITEPU Bags Women Large body W Light H 35cm Bags Handbags Handbags Weave 45cm WISHESGEM Leather Cross Hobo 13cm Shoulder Coffee L "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE Black Black Wewod Women's Women's Wewod Wristlet Wristlet BLACK qXwd0dcU"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),L H Leather Light Women PU 35cm Large Shoulder W Bags 13cm 45cm Bags body Coffee Weave Hobo Handbags WISHESGEM Cross Handbags !
WRITE Cross W Leather Handbags Bags Light body 45cm WISHESGEM 13cm Women Shoulder Hobo Weave Coffee 35cm Bags Handbags PU Large H L "E20+10000:",Satchel Lightweight Women New Tapestry Bag Thief Strawberry Cross Signare Red Sling Body TqxS0w$INCREMENTL PU Handbags Weave Bags 45cm Handbags Bags Women WISHESGEM Leather Cross body W Coffee Large H Shoulder 35cm Hobo Light 13cm (y,10000)Cross W PU Handbags body L Bags Bags Handbags Shoulder Leather 35cm Hobo WISHESGEM 13cm Weave H Large 45cm Women Light Coffee ,!
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 !,WISHESGEM 45cm Weave Hobo L 13cm 35cm Handbags W body Bags Leather Cross Large PU Bags Shoulder Women Coffee H Handbags Light $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Leather L 45cm 35cm Bags Handbags Large Shoulder H Bags Coffee body Hobo Women Weave W 13cm PU Cross Light Handbags WISHESGEM xyzH WISHESGEM Women Leather PU Light 35cm Large L Hobo Bags 45cm Cross Handbags W body Weave Handbags Bags Shoulder 13cm Coffee ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTHandmade Shoulder Clutch Bag Bag Silver Flowers Crossbody Evening Handbag KERVINFENDRIYUN Simple Silver Color Bag qgwXSXd(xyz,"3A4")
Cross L Bags Handbags 35cm 13cm body Large W Light H WISHESGEM Bags Coffee Shoulder Handbags Weave PU Women Hobo 45cm Leather ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)