Data Types

Rune is a dynamically typed language with four core data types. Types are evaluated at runtime, and variables can change their type.

Number

All numbers in Rune are IEEE 754 double-precision floating-point values. Rune does not distinguish between integers and decimal numbers at the language level.

set integer = 42
set decimal = 3.14159
set negative = -10

Whole values print without a decimal point (e.g., 42 instead of 42.0).

Word

A word is a text string delimited by single or double quotes.

set hello = "Hello, world!"
set language = 'Rune'

Escape Sequences

Words support the following backslash escape sequences:

Boolean

Rune uses plain-English keywords yes and no for booleans (instead of true and false).

set success = yes
set failure = no

Empty

The empty keyword represents the absence of a value (similar to null or None in other languages).

set result = empty