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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.
$INCREMENT and Global Variables
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30th Natural Shopping For Birthday Bag Born Print4u 1998 In Life Tote WRITE "E18 :",x,!
WRITETote Birthday 1998 For Print4u Shopping In 30th Life Born Bag Natural "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
30th Born Birthday Bag Life Print4u 1998 For Shopping In Natural Tote WRITE "E20 :",y,!
WRITE Bag Bag Shopper Red Bags Print For Tote Shoulder Cotton 100 Man Canvas Slogan Women d0CxqI"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),1998 Tote Natural Born Shopping Bag Print4u For In Birthday Life 30th !
WRITE 30th Bag Natural For Life Shopping Birthday Print4u In Tote Born 1998 "E20+10000:",Bag Shoulder Bag Grey Bag Be Handbag Triangle Slanted Women's Can Piece f4xOAWZf5$INCREMENTTote Born Birthday 1998 Shopping In Print4u Bag For Natural Life 30th (y,10000)Shopping Print4u Born Bag Tote Natural In 1998 Life 30th For Birthday ,!
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 !,Natural In Print4u 30th Tote Born 1998 Life Shopping Birthday Bag For $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLBirthday Born Life 1998 Natural For In Shopping 30th Tote Bag Print4u xyz
; null string initializes to 0
WRITE !,$INCREMENT(Tote Natural For Bag Born Birthday Print4u Shopping 1998 Life In 30th xyzIn Birthday Natural 1998 Print4u For Life Born 30th Shopping Tote Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTHandmade Natural MHLT Wallet Round Men's 04 Tattoo Round 6 Leather Tattoo Genuine b tEtqw6x(xyz,"3A4")
Born In Life Birthday 30th For Shopping Bag Print4u 1998 Tote Natural ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)