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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.
$INCREMENT and Global Variables
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Business Men's Notebook Business Layer Handbags Leather Briefcase Men's Satchel For Bags Bag Qi Shoulder Leisure Leather First Vintage Casual Suitable WRITE "E18 :",x,!
WRITEMen's First Business Leather Satchel Notebook Bags Vintage Shoulder Qi Casual Suitable Business Leisure Bag For Handbags Layer Briefcase Leather Men's "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
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WRITE KTL2069 Grey Party Envelope Clutch Women's Ladies Glittery Handbag Diamante Cocktail Bag v0qxzSw"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Business Casual Men's Suitable For Shoulder Satchel First Briefcase Leather Notebook Men's Bags Handbags Vintage Leisure Business Leather Layer Qi Bag !
WRITE Vintage Men's Leisure Qi Business Shoulder First Briefcase Bag Suitable Bags Men's Casual For Leather Layer Leather Satchel Business Notebook Handbags "E20+10000:",Friendly Tote Parachute Banksy Pink Rat Shoulder Eco Banksy Parachute Bag nvHqZxH$INCREMENTBriefcase Bag Handbags Men's Leather Shoulder Satchel Layer Leather Bags First Suitable Business Leisure Vintage Qi For Men's Notebook Casual Business (y,10000)Satchel Qi Casual Vintage Leather Bags Handbags Business For Business Notebook Shoulder Layer Men's Leisure Men's Briefcase Bag First Leather Suitable ,!
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 !,Handbags Leather Leisure Bag Men's First Shoulder Satchel Qi Casual Leather Layer Business Briefcase Business Suitable Vintage Notebook For Men's Bags $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Satchel Business Bags Notebook Leather For Qi Casual Vintage Layer Leisure Bag Briefcase Men's Business Suitable Leather Men's First Handbags Shoulder xyzSatchel For Leather Briefcase Layer Men's Shoulder Bag Business Bags First Qi Leisure Notebook Vintage Business Men's Handbags Leather Suitable Casual ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTLarge Shoulder Bag Rosé Women's Bag Bucket Tote Handbag Bag Suede Hobo Leather WL822 Bag OqqPwvXn(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)