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

A function can be used as an argument in other functions.

`let` bindings created inside a function are destroyed when the function ends.

The number of parameters passed to a function can be more than the number of parameters stated in its definition.

The number of parameters passed to a function can be less than the number of parameters stated in its definition.

Which of these features about a function is incorrect?

Which of these features about a function is incorrect?

In the following code, what kind of function is `checkFactor100()`?

```
let checkFactor = (x, y) => { (x mod y == 0) ? true : false };

let checkFactor100 = checkFactor(100);
```
	

In the following code, what kind of function is <code>checkFactor100()</code>?
<pre><code>let checkFactor = (x, y) =&gt; { (x mod y == 0) ? true : false };

let checkFactor100 = checkFactor(100);
</code></pre>

In order to make a function recursive, what keyword must be used?

In order to make a function recursive, what keyword must be used?

What is the parameter type of this function?

```
let func = () => 5 + 10;
```

What is the parameter type of this function?
<pre><code>let func = () =&gt; 5 + 10;
</code></pre>

In the code below, what kind of objects are `first`, `second` and `third`?

```
let makeTuple = (~first as a, ~second as b, ~third as c) => (a, b, c);
```

In the code below, what kind of objects are <code>first</code>, <code>second</code> and <code>third</code>?
<pre><code>let makeTuple = (~first as a, ~second as b, ~third as c) =&gt; (a, b, c);
</code></pre>

Test your knowledge on functions with this cool quiz!

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Quiz