Metrologic IS1000 Series Betriebsanweisung PDF herunterladen (Seite 22)

CipherLab BASIC Compiler

User's Guide

 Integer Constants -

Whole numbers between - 32,768 and + 32,767. No decimal

point.

 Real Number Constants -

Positive or negative real numbers, that is, numbers that contain

a decimal point, such as 5.34 or - 10.0.

 Long Integer Constants -

Whole numbers between - 2,147,483,648 and + 2,147,483,647.

4.2 Variables

Variables are symbols used to represent data items, such as numerical values or character

strings that are used in a BASIC program. The value of a variable may be assigned

explicitly and can be changed during the execution of a program. Be aware that the value of

a variable is assumed to be undefined until a value is assigned to it.

4.2.1 Variable Names and Declaration Characters

The following are the rules for variable names and declaration characters:

 A variable name must begin with a letter (A to Z).

 The remaining characters can be letters, numbers, and/or underscores.

 The last character can be one of these type declaration characters:

% integer

: 2 bytes (- 32,768 to + 32,767)

& long

: 4 bytes (- 2,147,483,648 to + 2,147,483,647)

! real number

: 4 bytes

$ string

: 250 bytes

nothing (default)

: 2 bytes (- 32,768 to + 32,767)

 Only 4 types of variables are supported. The maximum number of variables is 1,000.

 The variable name cannot be a BASIC reserved word.

 Variable names are not case sensitive.

4.2.2 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.

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Metrologic IS1000 Series Betriebsanweisung Seite 22