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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.
$INCREMENT and Global Variables
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Bag Handbags Shoulder College Cross Two For Nice Tone Tote LeahWard® Small Body Work Apricot School Cross Faux Body Across Bag Ladies Leather Women 901 Holiday WRITE "E18 :",x,!
WRITELadies 901 Cross Body Tote Cross Small Bag College Nice Work Across For Leather Bag Shoulder Faux Handbags Tone LeahWard® Holiday Apricot School Body Women Two "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE "E20-10000:",$INCREMENT(y,-10000),Ladies Cross Bag Cross Across Work Shoulder Handbags Tote School Two Faux Bag Apricot Body Women Small Nice Tone Body LeahWard® 901 For Leather Holiday College !
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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 !,LeahWard® Body Ladies Handbags College Tone Tote Bag Women Cross School Two Work 901 Shoulder Across Nice Faux Cross Holiday Small For Apricot Body Bag Leather $INCREMENT(xyz,0) ; still zero
WRITE !,$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(Nice LeahWard® Body Tone Faux Apricot Leather Ladies School College Work Body Holiday Handbags Bag Two Cross Women Small 901 Shoulder Across Tote Cross Bag For xyzBody Tone Cross Across Bag Women Nice Handbags Shoulder Two Apricot Small Work For Body School Cross Holiday Leather Ladies College 901 Tote Bag Faux LeahWard® ,2)
; increments by 2
; null string increments by 0 (xyz=2)
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)