Data Types

// Integers (default: Int)
let x = 20
let y = 10
let negative = -42

// Basic arithmetic operations
print(x + y)  // Addition: 30
print(x - y)  // Subtraction: 10
print(x * y)  // Multiplication: 200
print(x / y)  // Division: 2
print(x % y)  // Modulus: 0

// Double precision by default
let pi = 3.14159
let radius = 5.0
let area = pi * radius * radius

// Scientific notation
let large_number = 1.23e6  // 1,230,000
let small_number = 4.56e-3 // 0.00456

// Simple strings
print("Hello World")
print("Hello\nWorld")    // With escape sequences
print("Hello\tWorld")    // Tab character

// Basic interpolation
let greeting = "Hello"
let name = "Simon"
print(`{greeting}, {name}!`)  // "Hello, Simon!"

// Expression interpolation
print(`1 + 1 = {1 + 1}`)      // "1 + 1 = 2"

// Complex expressions
let count = 5
print(`There are {count} items`)
print(`Math result: {count * 2 + 1}`)

let greeting = "Hello"
let full_message = greeting + " World"
print(full_message)  // "Hello World"

// String comparison
let name1 = "Alice"
let name2 = "alice"
print(name1 == name2)  // false (case-sensitive)

// Create empty typed vector
let strings = String[]
strings.push("Hello")
strings.push("World")
print(strings)  // ["Hello", "World"]

// Initialize with values
let numbers = [1, 2, 3, 4, 5]
let names = ["Alice", "Bob", "Charlie"]

// Explicit typing
let ages: Int[] = [25, 30, 35]
let scores: Double[] = [95.5, 87.2, 92.8]

let numbers = [1, 2, 3]

// Adding elements
numbers.push(4)
numbers.push(5)

// Accessing elements
print(numbers[0])     // First element: 1
print(numbers[-1])    // Last element: 5

// Vector length
print(numbers.length) // 5

// Iteration
for item in numbers {
  print(`Number: {item}`)
}

// Simple object
let person = {
  name = "John",
  age = 30,
  email = "john@example.com"
}

// Nested objects
let user = {
  profile = {
      name = "Alice",
      avatar = "avatar.png"
  },
  settings = {
      theme = "dark",
      notifications = true
  }
}

// Accessing fields with dot notation
print(person.name)        // "John"
print(user.profile.name)  // "Alice"

let is_active = true
let is_complete = false

// Boolean operations
let can_proceed = is_active && !is_complete
let should_stop = !is_active || is_complete

// Boolean from comparisons
let is_adult = age >= 18

// Option types
fun find_user(id: Int): Option<User> {
  if id > 0 {
      Some(User { id = id, name = "Found" })
  } else {
      None
  }
}

match find_user(123) {
  Some(user) => print(`Found: {user.name}`),
  None => print("User not found")
}