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

# Problem Statement 
In this exercise, you have to implement the `calculator` type and create the `cal` object from it. Your calculator will perform **four** basic tasks:

- Addition

- Subtraction
- Multiplication
- Division

Each function will take two **floats** as parameters. These floats will **not** be values of the object. Instead, they'll be specified in the function calls. 

Make sure that `cal` is a **closed object**.

## Sample Input
```java
cal#add(10.0, 5.0);

cal#subtract(10.0, 5.0);

cal#multiply(10.0, 5.0);

cal#divide(10.0, 5.0);
```

## Sample Output
```java
15.0

5.0

50.0

2.0
```

# Coding Challenge
Below, you must write code for the `calculator` type as well as the `calculator` object. Remember that the names of all the functions must be identical to the ones in the **Sample Output**. Furthermore, these functions should be *public* and must only handle floats.

Take some time to flesh out the logic behind this problem before jumping to the actual implementation. It isn't very tricky if you understand the concepts we've covered in this section.

If you feel stuck, you can always refer to the solution review in the next lesson.

Good luck!



Let's create an object which performs the basic functions of a calculator.

A Brief Introduction

Data Types

Identifiers

Data Structures

Conditional Expressions

Functions

Loops

Variants

Objects

Exercise: The Calculator Object

Problem Statement