ac.expression

Syntax
Category	BASIC
Type	Definition
Description	any numeric constant or any arithmetic, logical, or string expression which evaluates to a valid numeric value, used to reference an "attribute count" within statements, functions, and array or string variables which require or allow them. See "data representation" for valid numeric values.
Options
See Also	data representation LT WRITEV array references REPLACE > vc.expression READV INS < WRITEVU sc.expression INSERT LOCATE EXTRACT ( )
Example	readv company.name from customer.file,cust.id,1 else... In this example, "1" is the ac.expression. apos = 2 readv company.address from customer.file,cust.id,apos else.. The variable "apos" must be numeric; in this case it is a 2. customer.item<1> = "test string" The numeric constant "1" indicates attribute 1 of the string in the "customer.item" variable. audit.item<bpos+i> = amount.list<bpos> The arithmetic expression, "bpos+i", calculates the attribute position in "audit.item".
Warnings	"ac.expression" must evaluate to a numeric, otherwise, FlashBASIC runtime displays the following warning message: [b16] in program 'pgm', line n: Non-numeric data when numeric required; zero used. In the case of a "readv", the above message is followed by: [b18] in program 'pgm', line n: Attribute number less than -1 is illegal.
Compatibility	D3 7.0 AP R83