Variables & Data Types

Variables

Variables are declared using let. They are dynamically typed.

let x = 10
let name = "Kodi"
let isActive = true

Data Types

Primitives

• Number: 64-bit floating point (e.g., 10, 3.14).
• String: Double-quoted text (e.g., "Hello").
• Boolean: true or false.
• Null: null.

String Templates

Strings support interpolation using ${expression} syntax.

let name = "World"
print("Hello ${name}!")   // Output: Hello World!
 
let a = 10
let b = 20
print("Sum: ${a + b}")    // Output: Sum: 30
 
// Escaping
print("Price: \$100")     // Output: Price: $100

Arrays

Lists of values. Elements can be of mixed types.

let list = [1, "two", true]
print(list[0]) // 1

Objects

Key-value pairs (Hash maps).

let person = {
    name: "Alice",
    age: 30
}
print(person["name"])
print(person.age)