ReasonML has been skyrocketing in popularity lately, and for good... reason. Very recently developed by Facebook, it provides users a strong-typed, clean, and efficient syntax for JavaScript, which makes it great for web development. 

This course will get you up to speed programming in Reason. You'll start by learning how to create simple data objects and build up to more powerful tools such as functions and data structures. Along the way, interactive quizzes and exercises will help you gain a stronger grasp of the language.

Anyone looking to put themselves on the cutting-edge of web development would be well served to have a look at this course.

Functional Programming with ReasonML

## The Definition

> A list is an immutable data structure which stores homogenous elements (elements of the same type) in sequential form. 

The reason it differs from other structures like tuples or arrays is that a list is a **polymorphic variant type**. 

To understand why a list is a variant, we need to look at its structure.

## The Structure
As a general convention in Reason, the start of a list is called the `head`, while the end of the list is known as its `tail`.

Here is the template for a Reason list:


# The Definition

> A list is an immutable data structure which stores homogenous elements (elements of the same type) in sequential form. 

The reason it differs from other structures like tuples or arrays is that a list is a **polymorphic variant type**. 

To understand why a list is a variant, we need to look at its structure.

# The Structure
As a general convention in Reason, the start of a list is called the `head`, while the end of the list is known as its `tail`.

Here is the template for a Reason list:


In this lesson, we will be introduced to the advanced variant data structure called the list.

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Lists

The Definition

The Structure