Denso BHT-BASIC 100 SERIES, Programmer'S Manual

Page: 73 / 577

Chapter 5. Data Types
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5.2 Variables
A variable is a symbolic name that refers to a unit of data storage. The contents of a variable
can change during program execution.
5.2.1 Types of Variables according to Format
Variables are classified into two types: string variables and numeric variables, each of which is
subclassified into non-array and array types.
Array variables should be declared in any of the DIM , COMMON , and DEFREG statements.
Note that the DIM statement should precede statements that will access the array variable.
BHT-BASIC can handle array variables up to two-dimensional.
The subscript range for an array variable is from 0 to 254.
[ 1 ] String Variables
A string variable should consist of 1 through 255 characters.
• Non-array string variables
A non-array string variable should be formatted with an identifier followed by a dollar sign
($) as shown below.
Syntax: identifier$
Example:
a$,bcd123$
The default number of characters for a non-array string variable is 40.
• Array string variables
An array string variable should be formatted with an identifier followed by a dollar sign ($)
and a pair of parentheses () as shown below.
Syntax:
identifier$(subscript[,subscript])
Example: a$(2),bcd123$(1,3)
Where a pair of parentheses indicates an array.
The default number of characters for an array string variable is 20.
Classification of Variables Example
String variables Non-array type ab3$
Array type One-dimensional
Two-dimensional
e$ (10)
gh$ (1,3)
Numeric variables Integer variables Non-array type a%
Array type One-dimensional
Two-dimensional
e% (10)
fg% (2,3)
Real variables Non-array type a,bcd
Array type One-dimensional
Two-dimensional
e (10)
fg (2,3)