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Install using gem install changer Register with Rapidapi.com and set your ENV variable 'RAPID_API_KEY' to your X-RapidAPI-Key value.

Currency objects are created using Currency.new(:sym, amount) where :sym is the type (:usd) and amount is the value (2.99)

Conversion can be done in place with the bang methods, or return new objects with the regular methods convert, and convert_at. Convert will fetch the rate from exchangerates API, while convert_at will use the rate given in the parameter

The math operator methods will handle conversion prior to completing the math operation, and return a value in the type of the calling object. For instance, adding US Dollars and Canadian Dollars will return a value in US Dollars, while adding Canadian Dollars to US Dollars will return Canadian Dollars. These methods can be chained ie; USD 3.00 + GBP 2.90 - CAD 6.00 = USD xx.xx