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

## Mixing Different Types
Reason ensures that a value of a particular type only interacts with values of the same type.

### Inconsistency in Arithmetic

If we try and mix different types in a computation, the compiler will throw a **type exception**:



# Mixing Different Types
Reason ensures that a value of a particular type only interacts with values of the same type.

## Inconsistency in Arithmetic

If we try and mix different types in a computation, the compiler will throw a **type exception**:



In this lesson, we'll see how Reason deals with inconsistencies in types.

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Type Errors

Mixing Different Types

Inconsistency in Arithmetic