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

What will be returned by the following code?

```reason
let num = 35;

if (num < 100 && num >= 10) {
	if(num > 30) {
 	if(num < 40) {
 	Js.log("a");
 } else {
 	Js.log("b");
 }
 } 
 else {
 	Js.log("c");
 } 
}
else {
 Js.log("d");
};

```

What will be returned by the following code?
<pre><code class="language-reason">let num = 35;

if (num &lt; 100 &amp;&amp; num &gt;= 10) {
	if(num &gt; 30) {
 	if(num &lt; 40) {
 	Js.log(&quot;a&quot;);
 } else {
 	Js.log(&quot;b&quot;);
 }
 } 
 else {
 	Js.log(&quot;c&quot;);
 } 
}
else {
 Js.log(&quot;d&quot;);
};

</code></pre>

What is the type of the expression in the `if` condition?

What is the type of the expression in the <code>if</code> condition?

What is the operator used to separate the different cases in a `switch` expression?

What is the operator used to separate the different cases in a <code>switch</code> expression?

The ternary operator is a substitute for the `if-else` expression because both can be used when the condition has three possible outcomes.

The ternary operator is a substitute for the <code>if-else</code> expression because both can be used when the condition has three possible outcomes.

Test your knowledge on conditionals with this quiz!

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Quiz