Explore ReasonML's growing popularity and its strong-typed syntax for JavaScript. Learn about creating data objects, functions, and data structures through interactive quizzes and exercises.

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

## Mutable Fields
Believe it or not, we can define some record fields as mutable. This means that we can change their values in the future. 

To make a field mutable, we must prepend the `mutable` keyword to it.

# Mutable Fields
Believe it or not, we can define some record fields as mutable. This means that we can change their values in the future. 

To make a field mutable, we must prepend the `mutable` keyword to it.

In this lesson, we'll explore different ways of altering the contents of a record.

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Record Mutation

Mutable Fields