Intel 9800758-02 manual String Arrays

Language Elements BASIC-80

String Arrays

Like numeric arrays, string arrays can be dimensioned with the DIM statement. The format for dimensioning a string array is the same as for numeric arrays:

DIM A$(5,25,40)

If you don't execute a DIM statement, a default of 10 for each subscript is assumed. If this value is then exceeded, an error message will result.

Table 2-6. BASIC-80 Operators in Order of Precedence

Order	Operator	Example
1.	Expressions in parentheses.	(A+B)
2·.	Exponentiation, as shown in the example,	AtB
	where A is raised to the B power.
3.	Negation, represented by the minus sign.	-A
4.	Multiplication and Division, represented by	A*B
	an asterisk (*) and a slash (I) respectively.	AlB
5.	Integer division, represented by a
	backslash ( ). Both arguments are con-	A\B
	verted to integer values and the result is
	truncated to an integer.
6.	Integer Modulus, represented by MOD.
	Both arguments are converted into in-	AMODB
	tegers. The result is the remainder when
	the first is divided by the second.
7.	Addition and Subtraction, represented by	A+B
	(+) and minus (-) signs.	A-B
8.	Relational Operators. These are listed
	without precedence. For all relational
	operators, the result is -1 if true, and 0 if
	false. The arguments A and B must be both
	strings or both numeric variables.
	Equals sign: Used to test for equality.	A=B
	Greater Than: Used to test magnitude be-
	tween two arguments. The large end of the	A>B
	sign faces the posited greater value.
	Less Than: Used to test magnitude between
	two arguments. The small end of the	A<B
	sign faces the posited less.er value.
	Not Equal: Used to test for inequality be-	A><B
	tween two arguments.	A<>B
	Greater Than or Equal To: Used to test	A=>B
	magnitude down to the level of the second
		A>=B
	argument.
	Less Than or Equal To: Used to test	A=<B
	magnitude up to the value of the second
		A<=B
	argument.

In the Logical Operators below, the arguments are converted to 16-bit, signed two's complement integers in the range -32768 to +32767. The result of the operation is converted to the same format. The operations are performed one bit at a time, com- paring the nth bit of X with the nth bit of Y.

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