Variables & Types

Variables

var x = 42          // mutable
const y = 100       // immutable

Basic Types

var age: int = 25           // 64-bit integer
var price: float = 19.99    // double precision
var name: string = "Alice"  // string
var active: bool = true     // boolean

Type inference works — you can omit the type when the compiler can figure it out:

var count = 0       // int
var pi = 3.14       // float
var msg = "hello"   // string

Strings

String interpolation with ${}:

var name = "Wyn"
var version = 1
println("${name} v${version}")   // "Wyn v1"

Arrays

var numbers = [1, 2, 3, 4, 5]
var names: [string] = ["Alice", "Bob"]

var first = numbers[0]          // 1
var len = numbers.len()         // 5

List Comprehensions

var squares = [x * x for x in 0..10]
var evens = [x for x in 0..20 if x % 2 == 0]

Slices

var nums = [1, 2, 3, 4, 5]
var first3 = nums[0:3]             // [1, 2, 3]
var hello = "hello world"[0:5]     // "hello"

Constants

const MAX_SIZE = 1024
const PI = 3.14159
const GREETING = "Hello"

Try It

🐉 Playground

var name = "Wyn" var version = 18 var pi = 3.14 var active = true println("${name} v${version}") println("pi = ${pi}") var numbers = [1, 2, 3, 4, 5] println("first = ${numbers[0]}, len = ${numbers.len()}") var squares = [x * x for x in 0..6] println("squares: ${squares}")

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