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

By default, <code>let</code> bindings are mutable.

What will be the output of the following piece of code?

```
let a: string = "Hello";
{
	let a = a ++ "Educative";
  Js.log(a);
};
Js.log(a);
```

What will be the output of the following piece of code?
<pre><code>let a: string = &quot;Hello&quot;;
{
	let a = a ++ &quot;Educative&quot;;
 Js.log(a);
};
Js.log(a);
</code></pre>

What can be used to make a `let` binding mutable?

What can be used to make a <code>let</code> binding mutable?

Which operator can be used to access the reference inside a `ref` wrapper?

Which operator can be used to access the reference inside a <code>ref</code> wrapper?

What will be the output of this code?

```
let str: char = "Educative";
Js.log(str);
```

What will be the output of this code?
<pre><code>let str: char = &quot;Educative&quot;;
Js.log(str);
</code></pre>


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In the next chapter, we will study the primary data structures of ReasonML. But before that, try solving the coding exercise in the next lesson.

Tets your knowledge on identifiers with this fun quiz!

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Quiz