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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.
$INCREMENT and Global Variables
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Light Bags body Leather Women PU L WISHESGEM 35cm 13cm 45cm Handbags H Cross Shoulder Hobo W Large Coffee Bags Handbags Weave WRITE "E18 :",x,!
WRITEH PU Shoulder Coffee Leather WISHESGEM 35cm W Bags Light Weave Handbags 45cm Handbags Bags L Hobo 13cm Cross body Large Women "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Women 35cm 13cm body Light H Handbags Bags WISHESGEM 45cm PU Bags Cross Leather L Weave W Large Coffee Hobo Shoulder Handbags WRITE "E20 :",y,!
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WRITE "E20-10000:",$INCREMENT(y,-10000),13cm Light 45cm Handbags body L WISHESGEM Weave 35cm Shoulder PU Handbags Leather Bags W Women Hobo H Bags Large Coffee Cross !
WRITE 13cm Cross Women Weave L Handbags 35cm Bags Coffee Hobo Light body PU Handbags H 45cm Bags Leather Large WISHESGEM Shoulder W "E20+10000:",Beaded Royal Bag Beaded Suede Clutch Blue Clutch HandBags Royal HandBags Suede Bag Girly Blue Girly IxwOqn7fa$INCREMENTHobo Leather Women Bags L Cross 35cm body Large Handbags Bags 45cm Weave PU 13cm Shoulder Handbags Light W WISHESGEM Coffee H (y,10000)Women PU Cross Large Shoulder Leather WISHESGEM Coffee 35cm Bags Light 45cm Handbags H L Handbags W Bags 13cm Hobo Weave body ,!
WRITE "E20+1 :",$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 13cm Handbags Large Bags Bags H 45cm W Leather L Handbags WISHESGEM 35cm Cross Shoulder Light Women Hobo body PU 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 !,$INCREMENT(Large W Handbags Bags WISHESGEM Handbags Women 35cm PU Leather Cross H Light Weave body Hobo 45cm Coffee Shoulder L 13cm Bags xyzH 35cm Bags 13cm Cross 45cm PU Large Light Weave Bags Women Coffee W L Hobo body Handbags Handbags WISHESGEM Shoulder Leather ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTWallet Brown Business Wallet Brown Crocodile Long Wallet Long Men's Men's YaIw8xqgp(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)