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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.
$INCREMENT and Global Variables
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Bag Business For Men's Men's Leather Qi Shoulder Bags Satchel Casual Vintage Leisure Handbags Notebook Business Briefcase Suitable First Leather Layer WRITE "E18 :",x,!
WRITEHandbags Men's Briefcase Bags Leather Leisure Bag Business Satchel Layer Notebook Men's Vintage For Shoulder Leather Suitable First Qi Casual Business "E18+1 :",$INCREMENT(x),!
WRITE "E18+4 :",$INCREMENT(x,4),!
WRITE "E18-6 :",$INCREMENT(x,-6),!
WRITE "E18+0 :",$INCREMENT(x,0),!
Business Leather Shoulder For Handbags Bags Vintage First Men's Casual Leisure Satchel Men's Notebook Suitable Layer Briefcase Bag Qi Business Leather WRITE "E20 :",y,!
WRITE Purse Ivory Clutch Bag Ladies Satin Women's Floral Handbag Flower Party Evening KH2213 t8xfxPwq"E20+0 :",$INCREMENT(y,0),!
WRITE "E20-10000:",$INCREMENT(y,-10000),Business Leather Briefcase Layer Satchel Casual Vintage Bag First Notebook Bags Business Suitable Men's Leisure Handbags Leather Qi For Men's Shoulder !
WRITE First Leisure Bags Suitable Bag Casual Leather Men's Vintage Business Men's Satchel Business Handbags Notebook Briefcase For Qi Shoulder Layer Leather "E20+10000:",Pink Bridal Ladies With Bag Weddings Shoulder Body Quilted Gossip Strap For Evening Girl Gold Gold Padded Jelly Small Ideal Parties Cross Chain Chain Prom fRggSxnqw$INCREMENTLeather Men's Bags Leisure Suitable Bag Business Casual Satchel Men's Vintage Layer Qi Notebook Business For Handbags Briefcase Shoulder Leather First (y,10000)Vintage Leisure Leather Casual Layer Leather First Handbags Suitable Men's Business Shoulder Qi Bags Bag For Briefcase Satchel Notebook Men's Business ,!
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 !,Business Bag Men's Handbags Layer Vintage Leather Shoulder For Suitable Qi First Notebook Leather Satchel Bags Business Briefcase Leisure Men's Casual $INCREMENT(xyz,0) ; still zero
WRITE !,$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 !,$INCREMENT(Bag Layer Satchel Business Business Men's Leisure Notebook Leather Leather Casual For Shoulder First Vintage Suitable Qi Men's Handbags Briefcase Bags xyzShoulder Business Men's First Leather Qi For Notebook Bags Satchel Leather Layer Casual Leisure Business Handbags Men's Vintage Suitable Briefcase Bag ,2)
; increments by 2
; null string increments by 0 (xyz=2)
WRITE !,$INCREMENTFloral Floral Bag Bee Grey LeahWard 61 Shoulder Body Women's Cross Handbags tnwIX(xyz,"3A4")
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; nonnumeric string evaluates as zero (xyz=5)
; increments by 100 (scientific notation)