01-bonus-2--roman-numeral-to-integer

Bonus 2: Roman Numeral to Integer

Convert the provided Roman numeral (a String) to an Integer. For more information on Roman numerals, please go to Math Is Fun.

The String input will always consist of uppercase letters with a minimum length of 1. We will only be covering numbers below 4000, so you can safely ignore the "Really Big Numbers" section on the Math is Fun page we linked to.

Input: 'I'
Output: 1

Input: 'IX'
Output: 9

Input: 'CDII'
Output: 402

Use the language of your choosing. We've included starter files for some languages where you can pseudocode, explain your solution and code.

Before you start coding:

1. Rewrite the problem in your own words
2. Validate that you understand the problem
3. Write your own test cases
4. Pseudocode
5. Code!

And remember, don't run our tests until you've passed your own!

How to run your own tests

Ruby

1. cd into the ruby folder
2. ruby <filename>.rb

JavaScript

1. cd into the javascript folder
2. node <filename>.js

How to run our tests

Ruby

1. cd into the ruby folder
2. bundle install
3. rspec

JavaScript

1. cd into the javascript folder
2. npm i
3. npm test