How To Use Your Ruby Currency Converter to exit the country

Converting currencies by using our Ruby Exchange Rate API is as easy as posting a HTTP request. Your requests would need to follow this simple pattern:

Here are some examples in Ruby code:

1. Simple Currency Conversion (in Ruby):

To convert from 12.50 USD (US Dollar) to GBP (British Pound):

https://www.exchangerate-api.com/FROM_CURRENCY/TO_CURRENCY/AMOUNT?k=YOUR_API_KEY
require 'net/http'
from_curr = "USD"
to_curr = "GBP"
amount = 12.50
host = "www.exchangerate-api.com"
http = Net::HTTP.new(host, 80)
url = "/"+from_curr+"/"+to_curr+"/"+amount+"?k=API_KEY"
response = http.get(url)
puts response.body

Or to get how many Japanese Yen (JPY) there are to the South African Rand (ZAR):

require 'net/http'
host = "www.exchangerate-api.com"
http = Net::HTTP.new(host, 80)
response = http.get("/zar/jpy/?k=API_KEY")
puts response.body

Error Codes:

The API returns the following error codes:

• 1. If an invalid amount is used (must be numeric floating point or integer numbers)
• 1. If either of the 3 letter currency codes are invalid (Check our supported currencies)
• 1. If an invalid key is used (Get an API key)
• 1. If your monthly API query limit is reached (Click here for extended usage)
• 1. If an unresolvable IP address is provided (This only applies for our "Automatic Country/Flag Information" query.)

2. Automatic Currency Detection/Conversion (in Ruby):

To convert from 12.50 USD (US Dollar) to your user's currency:

require 'net/http'
host = "www.exchangerate-api.com"

http = Net::HTTP.new(host, 80)
ip = request.env['REMOTE_ADDR']

 url = "/auto/USD/"+ip+"/12.50?k=API_KEY"
 response = http.get(url)
 result = response.body

 return_array = result.split('|')
 converted_amount = return_array[0]
 symbol_unicode = return_array[1]
 currency_code = return_array[2]

 puts converted_amount #FINAL CONVERTED AMOUNT
 puts currency_code #FINAL 3-DIGIT CURRENCY CODE (EG: USD)

 #If you want to display the currency's symbol in HTML:
 symbol_html = ""
 symbol_characters = symbol_unicode.split(',')
 symbol_characters.each { |x|
 symbol_html = symbol_html+"&#"+x+";"
  }
 puts symbol_html #FINAL SYMBOL HTML (EG: $)

3. Automatic Country/Flag Information (in Ruby):

To retrieve your user's national flag and other country information:

require 'net/http'
host = "www.exchangerate-api.com"
http = Net::HTTP.new(host, 80)

ip = request.env['REMOTE_ADDR']

url = "/country_info/"+ip+"?k=API_KEY"
response = http.get(url)
result = response.body

return_array = result.split('|')
country_name = return_array[0]
country_code_2 = return_array[1]
country_code_3 = return_array[2]
currency_code = return_array[3]
symbol_unicode = return_array[4]
flag_url = return_array[5]

puts country_name #FINAL COUNTRY NAME
puts country_code_2 #FINAL 2-DIGIT COUNTRY CODE (EG: US)
puts country_code_3 #FINAL 3-DIGIT COUNTRY CODE (EG: USA)
puts currency_code #FINAL 3-DIGIT CURRENCY CODE (EG: USD)

#If you want to display the currency's symbol in HTML:
symbol_html = ""
symbol_characters = symbol_unicode.split(',')
symbol_characters.each { |x|
symbol_html = symbol_html+"&#"+x+";"
}
puts symbol_html #FINAL SYMBOL HTML (EG: $)

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