Programming instructions

Intermec Fingerprint 6.13 – Programmer's Guide

4. TERMINOLOGY AND SYNTAX, cont'd.

Constants are fixed text or values. There are two kinds:

• String constants are sequences of characters, i.e. text. If digits or

operators are included, they will be considered as text and will not

be processed. String constants must always be started and

terminated by double quotation marks ("..."), for example

"LABEL1.PRG".

• Numeric constants are fixed numeric values. Only decimal

integers are allowed, i.e. 1, 2, 3, 4, 5 etc. Decimal points (e.g.

1.56890765) are not supported. Values may be positive or

negative. Positive number may optionally be indicated by a

leading plus sign (+), whereas negative numbers always must be

indicated by a leading minus sign (-).

Note that certain characters, e.g. digits, can be either string

constants (text) or numeric constants (numbers). To allow the

firmware to detect that difference, string constants must always be

enclosed by double quotation marks (" ....."), as opposed to numeric

constants.

Variables are value holders. There are two main types:

• String variables are used to store strings entered as string constants

or produced by Fingerprint instructions. Max. size is 64 kbytes.

String variables are indicated by a trailing $ sign.

Examples:

A$ = "EASYCODER PRINTER"

B$ = TIME$

LET C$ = DATE$

• Numeric variables are used to store numbers, entered as numeric

constants, or produced by Fingerprint instructions or operations.

Numeric variables are indicated by a trailing % sign.

Examples:

A% = 150

B% = DATEDIFF ("981001","981130")

LET C% = 2^2

The name of a variable may consist of letters, numbers and decimal

points. The first character must always be a letter. No keywords or

keyword abbreviations must be used. However, completely em-

bedded keywords are allowed.

Examples:

LOC is a keyword

CLOCK$ = "ABC" is OK

LOC$ = "ABC" causes an error

LOCK$ = "ABC" causes an error.

Continued!

6. Constants

7. Variables