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

1 Mentor

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

90 Students

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

22 Exercises

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

About ReasonML

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

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

Reason's a great choice for Javascript programmers who want to get intoi statically typed functional programming.
Fun. Challenging. Interesting

Community-sourced ReasonML exercises

These are a few of the 22 exercises on the ReasonML track. You can see all the exercises here.

Space Age
enum types
floating point arithmetic
fun expressions
Run Length Encoding
converting strings to ints
Roman Numerals
Protein Translation
data transform
hash map lookup

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

Join the ReasonML Track