Argox PA-20 Basic Programming Manual - Manual (Page 10)

PT-Basic Programming Manual Ver. 1.00 9/143
2.2.1 Variable Names and Declaration Characters
The following are the rules to declare variable names and
characters:
 A variable name must be begun with a letter.
 The remaining characters can be letters, numbers, or
underscores.
 The last character can be one of these declaration characters:
% (Integer) : 4 bytes (- 2147483648 to 2147483647)
! (Real number) : 8 bytes
$ (String) : 255 bytes
 Variable name cannot be any BASIC reserved words.
 Only 3 types of variable are supported.
 Variable names are case ( upper or lower case ) dependent.
2.2.2 Array Variables
An array is a group or table of values referenced by the same
variable name. Each element in an array is referenced by an array
variable that is subscripted with an integer or an integer
expression.
Each element in an array is referenced by an array variable that is
subscripted with an integer or an integer expression. In PT-Basic,
the maximum number of dimensions for an array is 2.
For example:
 A$(8) „one dimension array
 Str%(2,5) „two dimension array
 DIM A%(23)
„declares an integer array with 23
elements.
 DIM Str$(60) „declares a string array with 60 elements.
2.3 Expression and Operators
An expression may be a string or numeric constant, or a variable, or it may
be a combination of constants and variables with operators to produce a
string value.
Operators perform mathematical or logical operations.