ReasonML

Join the ReasonML Track
ReasonML is a strongly typed functional language which compiles to both Javascript and native.
Join the ReasonML Track
Track mentors

2 Mentors

Our mentors are friendly, experienced ReasonML developers who will help teach you new techniques and tricks.
Track students

921 Students

Join hundreds of students who have enjoyed learning and improving their skills by taking this track.
Track exercises

24 Exercises

Hundreds of hours have gone into making these exercises fun, useful, and challenging to help you enjoy learning.

About ReasonML

let message = () => "Welcome to Reason!";

Reason is a syntax and toolchain geared towards Javascript programmers, based on the functional language OCaml

Being statically typed, it is likely to be safer than Javascript, but has powerful type inference which means type annotations do not get in your way.

The Exercism exercises will compile directly to JS, but Reason can be compiled via the OCaml toolchain to native code, IoS, Android, and even microcontrollers

Join the ReasonML track

Exercism is a great website

Exercism is a great website where I was able to have some very interesting challenges.

Relaxed. Encouraging. Supportive.

Meet the ReasonML Track mentors

Once you join the ReasonML language track, you will receive support and feedback from our team of mentors. Here are the bios of a few of the mentors of this track.

Avatar of Stephen Bastians

Stephen Bastians https://github.com/stevejb71

Reason's a great choice for Javascript programmers who want to get intoi statically typed functional programming.
Avatar of Brad Decker

Brad Decker Website

I believe a strong type system is crucial for building applications that scale. I love ReasonML and OCaml, but have more experience with Typescript
Fun. Challenging. Interesting

Community-sourced ReasonML exercises

These are a few of the 24 exercises on the ReasonML track. You can see all the exercises here.

Armstrong Numbers
easy
arrays
folding
algorithms
math
Hello World
easy
setting up reasonml dev environment
strings
Raindrops
easy
fun expressions
list map function
Phone Number
easy
strings
regular expressions
All Your Base
easy
algorithms
integers
lists
folding
math
Leap
easy
booleans
integers
Passionate. Knowledgeable. Creative.

Meet the ReasonML Track maintainers

The ReasonML Maintainers are the brains behind the ReasonML Track. They spend their spare time creating interesting and challenging exercises that we can all learn from. We are incredibly grateful for their hard work. Here are the bios of a few of the maintainers of this track.

Avatar of Tejas Bubane

Tejas Bubane My blog

Primarily a Ruby & Javascript coder, getting better at functional programming with Haskell and ReasonML, emacs lover.

Get started with the ReasonML track. As with everything on Exercism, it's 100% free!

Join the ReasonML Track