Literals

Literals are direct representations of variable values.

A numerical literal is a decimal number or a number with a certain base (e.g. binary). The underscore “_” character, inserted between the numbers in a numerical literal, is not relevant.

Literal Example
Integer number
-12, 0, 123_4, +986
Floating point number
0.0, 0.4560, 3.14159_26
Floating point number with an exponent\\-1.34E-12, -1.34e-12
Binary number
2#1111_1111 (255 decimal)
Octal number
8#377 (255 decimal)
Hexadecimal number
16#FF, 16#ff (255 decimal)
Boolean number
0, 1, FALSE, TRUE
Typed number
INT#-123, WORD#16#AEF, BOOL#0, BOOL#FALSE

Examples:

REAL#+INF, REAL#-INF, LREAL#+INF, LREAL#-INF //literals of special values of real numbers (+- infinity)
REAL#NAN, LREAL#NAN //literals of special values of real numbers (not a number)

Character literals are one- or two bytes coded characters. A one-byte literal is a sequence of zero or more characters with a prefix and ending using a single quote character ('). A two-byte literal is a sequence of zero or more characters with a prefix and ending using a single quote character (“).

Literal

Example

One-byte characters

Empty string

''

One character

'A'

Typed string

STRING#'OK'

Two-byte characters

Empty string

”“

One character

“A”

Typed string

STRING#“OK”

Combinations of two characters

Dollar sign

$$

Apostroph

$'

Quotation mark

$”

Line feed (new line, 16#0A)

$L or $I

Newline (new line)

$N

Form feed (new page)

$P

Carriage return (16#0D)

$R

Tabelator (16#09)

$T

Time literals represent a duration of an event, or time period elapsed between start and end of an event. Units are days, hours, minutes, seconds, fractions of seconds, and combinations of the above.

LiteralDescription
d Day
h Hour
m Minute
s Second
ms Millisecond
us Microsecond
ns Nanosecond

Examples:

T#14ms, TIME#14ms, T#-14ms, LT#14.7s, t#25h15m, TIME#5m_20s_500ms
Literal Example
Date DATE#1984-06-25, date#1984-06-25, D#1984-06-25, d#1984-06-25
Time of day
TIME_OF_DAY#15:36:55.36, TOD#15:36:55.36
Date and time\\DATE_AND_TIME#1984-06-25-15:36:55.360227400, DT#1984-06-25-15:36:55.360227400
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