Types

OSL supports six fundamental data types that can be used to represent various kinds of data.

String

Text values enclosed in double quotation marks.

// Basic string
name = "Hello"

// String with spaces
message = "Hello, World!"

// String with special characters
path = "C:/Users/Documents"

Boolean

Logical values representing true or false (case-insensitive).

// Boolean values
isTrue = true
isFalse = false

// In conditions
if true (
    log "This will execute"
)

// Boolean operations
result = true and false  // false

Number

Numeric values including integers and decimals.

// Integers
count = 42
negative = -10

// Decimals
price = 19.99
temperature = -2.5

// In calculations
total = 10.5 + 20  // 30.5

Array

Ordered collections of values enclosed in square brackets.

// Simple array
names = ["Alice", "Bob", "Charlie"]

// Mixed type array
data = [1, "two", true, 4.5]

// Nested array
matrix = [[1, 2], [3, 4]]

// Empty array
empty = []

Object

Key-value collections enclosed in curly braces.

// Simple object
person = {
    name: "John",
    age: 30
}

// Nested object
user = {
    info: {
        id: 123,
        email: "[e-mail]"
    },
    settings: {
        theme: "dark"
    }
}

// Object with arrays
data = {
    numbers: [1, 2, 3],
    flags: [true, false]
}

null

Represents an empty or undefined value.

// Explicit null
value = null

// Empty strings are the same as null
empty = ""

// Checking for null
if value == null (
    log "Value is null"
)

// In objects
user = {
    name: "John",
    middleName: null
}

Type Checking

You can check the type of a value using the .getType() method:

typeof("Hello")     // "string"
typeof(42)          // "number"
typeof(true)        // "boolean"
typeof([1,2,3])     // "array"
typeof({x:1})       // "object"
typeof(null)        // "null"

Important Notes

• Strings must use double quotes (")

• Booleans are case-insensitive (True or true)

• Numbers must match the pattern [0-9.\-]+

• Arrays can contain mixed types

• Object keys don't need quotes

• null represents absence of value

• All types support the .getType() method