title: How do I use the query parameters in the Dark Sky Forecast API ?(forecast.io)
body: <p>I'm using the Dark Sky Forecast API to retrieve some weather information.</p>
  
  <p>When I read the <a href="https://developer.forecast.io/docs/v2#options" rel="noreferrer">official doc</a>, I found that the "option" section describes the usage of query parameters.</p>
  
  <p>For example,</p>
  
  <blockquote>
    <p>The API request may optionally be modified through the use of query parameters. It will respond to the following:</p>
    
    <p>callback=[callback]: Return the API response as JSONP. Please use
    caution when using this, since exposing your API key to the public is
    a security hazard and, if abused, will result in the revokation of
    your API key. However, if developing a personal- or internal-use app,
    this is a convenient method of doing so.</p>
    
    <p>units=[setting]: Return the
    API response in units other than the default Imperial units. In
    particular, the following settings are possible:</p>
    
    <ul>
    <li><p>us: The default, as outlined above.</p></li>
    <li><p>si: Returns results in SI units. In particular, properties now have the following units:</p></li>
    <li><p>...</p></li>
    </ul>
  </blockquote>
  
  <p>I know how to get the weather information by take advantages of the call</p>
  
  <pre><code> https://api.forecast.io/forecast/APIKEY/LATITUDE,LONGITUDE
  </code></pre>
  
  <p>But I don't know how to combine the query parameters with it. </p>
  
  <p>Any ideas?</p>
  
  <hr>
  
  <p><strong>2015/10/23 UPDATE</strong></p>
  
  <p>Thank to Logan Kearns, using ? parameter solved my question. Make sure the query parameters are in lowercase.</p>
  
  <pre><code>https://api.forecast.io/forecast/APIKEY/LATITUDE,LONGITUDE?lang=zh-tw&amp;units=si
  </code></pre>