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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.
$INCREMENT and Global Variables
CP Green 15" Messenger Men's Laptop Molle Woodland Bag TACVASEN Military Shoulder Outdoor WRITE "E18 :",x,!
WRITECP Men's TACVASEN Shoulder Woodland Laptop Messenger Military 15" Molle Bag Outdoor Green "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Outdoor Woodland Messenger Shoulder Green 15" Military Molle Bag Men's TACVASEN Laptop CP WRITE "E20 :",y,!
WRITE Top Tote MacBook Notebook for Zip Canvas FOSTAK brown Grey Handbag Leather Ultrabook Shopper Tote Bag Bags Women Bag Laptop Shoulder Laptop Large 6 for Inch Pockets Handle Work 15 Multi THqwFd4xn"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),TACVASEN Outdoor Messenger Molle Laptop Bag Shoulder 15" Woodland CP Military Green Men's !
WRITE Molle Bag CP Military Men's 15" TACVASEN Green Shoulder Messenger Outdoor Laptop Woodland "E20+10000:",Damara Wedding Semi Gold Women ring Crystal Grid Handbag Flap rTwrgqP$INCREMENTWoodland Outdoor Bag Molle Messenger Military Men's CP Green 15" Shoulder Laptop TACVASEN (y,10000)Green Bag Molle Military Shoulder Woodland Men's 15" Messenger CP Laptop Outdoor TACVASEN ,!
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 !,Bag Green Military Messenger Outdoor Molle CP Shoulder Laptop Men's TACVASEN Woodland 15" $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Messenger Woodland TACVASEN 15" Bag Laptop Men's CP Military Shoulder Green Molle Outdoor xyz15" Outdoor CP Green Laptop Molle Shoulder Messenger TACVASEN Military Woodland Men's Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTold Wallet Wallet "Frandi" leather european 3 parts pink satin european UdTqXwT(xyz,"3A4")
TACVASEN 15" CP Military Messenger Laptop Molle Green Outdoor Bag Woodland Shoulder Men's ; increments by 3 (rest of string ignored)
; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)