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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.
$INCREMENT and Global Variables
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Leather amp; Anchor fold Bi Chevron Men's Wallet Genuine Personalized WRITE "E18 :",x,!
WRITEfold amp; Anchor Genuine Men's Wallet Chevron Leather Bi Personalized "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Chevron Genuine Leather Wallet amp; Personalized Men's Anchor fold Bi WRITE "E20 :",y,!
WRITE Handbag Ethnic Canvas C Kylin Embroidery Bag Tote Express Shoulder Bag Women Messenger wxqnEfAna"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Leather Bi Personalized amp; Men's Chevron Wallet Genuine fold Anchor !
WRITE Genuine Bi Personalized Anchor amp; Wallet Chevron fold Leather Men's "E20+10000:",Envelope Ladies Wedding Bag Red Clutch Stud Evening Callie Night Party Patent SWANKYSWANS Prom Celebrity Diamante Out T45W0P$INCREMENTAnchor Chevron Bi Genuine Personalized fold Wallet amp; Men's Leather (y,10000)Genuine amp; Men's Anchor Bi Chevron Wallet Leather Personalized fold ,!
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 !,Genuine amp; Men's Personalized Anchor Wallet Leather Chevron Bi fold $INCREMENT(xyz,0) ; still zero
WRITE !,$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)
KILLfold Chevron Leather Bi amp; Men's Genuine Personalized Wallet Anchor xyz
; null string initializes to 0
WRITE !,$INCREMENT(amp; fold Wallet Anchor Chevron Personalized Genuine Men's Bi Leather xyzamp; Wallet Genuine Men's Anchor Chevron Personalized Leather Bi fold ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTGrey Oilcloth OWL Shoulder Oilcloth Bag Shoulder Tote Bag Bag OWL Women Women Tote ZOq7pwx(xyz,"3A4")
Genuine Wallet Bi Leather fold Personalized Chevron Anchor Men's amp; ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)