Basics & Types

This guide covers the fundamental building blocks of the REK language. REK is dynamically typed, meaning you don't need to specify types when declaring variables.

Variables

Use let for mutable variables and const for constants.

let name = "REK"
name = "REK Language" // Valid

const pi = 3.14159
// pi = 3.14 // Error: Cannot assign to constant

Data Types

Primitives

• Number: Floats and Integers (e.g., 42, 3.14).
• String: Double-quoted text (e.g., "Hello").
• Boolean: true or false.
• Null: Represents absence of value null.

Lists

Ordered collections of values. Lists can hold mixed types.

let items = [1, "two", true]
log(items[0]) // 1
items[1] = "three"

Maps

Key-value pairs. Keys are strings.

let user = {
    "name": "Alice",
    "age": 30,
    "isAdmin": true
}

log(user["name"]) // Alice
user["role"] = "Editor" // Add new field

Control Flow

If / Else

Conditional execution with if, elif, and else.

let score = 85

if score >= 90 {
    log("A")
} elif score >= 80 {
    log("B")
} else {
    log("Try again")
}

While Loops

Repeat code while a condition is true.

let count = 0
while count < 5 {
    log(count)
    count = count + 1
}

For Loops

Iterate over lists.

let colors = ["red", "green", "blue"]

for color in colors {
    log(color)
}

Comments

Use // for single-line comments.

// This is a comment
let x = 10 // Inline comment