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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.
$INCREMENT and Global Variables
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Print4u 30th In For 1998 Life Birthday Bag Born Natural Shopping Tote WRITE "E18 :",x,!
WRITEPrint4u Birthday For 1998 Shopping Natural 30th Life Bag Tote Born In "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Shopping For Tote Born In Birthday Life Natural Bag 30th 1998 Print4u WRITE "E20 :",y,!
WRITE Silver Genuine Leather Large LIATALIA Metallic Handbag Shopper Leightweight ASTRID Floral Tote Soft Shoulder Hobo Italian 6dxdnqSF"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),1998 Tote Bag Natural Born Life Print4u 30th Birthday For In Shopping !
WRITE 1998 Bag Life Print4u For Birthday Born Natural Shopping In Tote 30th "E20+10000:",Genuine Window Designs Wallet for Leather Wallet ID 2 with Men Printed American Unique Bifold Stylish Flag wfxxURqp$INCREMENTShopping 30th Tote 1998 Life For In Born Natural Print4u Birthday Bag (y,10000)For Tote 30th Print4u Born In Life Natural Birthday Shopping Bag 1998 ,!
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 !,For Bag Shopping Birthday In Tote Born Life Natural Print4u 1998 30th $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLShopping Print4u Tote 1998 In 30th Life For Bag Born Birthday Natural xyz
; null string initializes to 0
WRITE !,$INCREMENT(Print4u For Life Bag Shopping 1998 Tote Born In 30th Birthday Natural xyzShopping In 1998 Print4u Natural Bag Life Birthday For 30th Born Tote ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTBag Flight Retro Red Malaysia Silhouette Silhouette Retro Black Malaysia 41HXKY(xyz,"3A4")
Life 30th 1998 Print4u In Birthday Tote Bag Shopping For Natural Born ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)