title: how SVG curveTo ( C ) works?
body: <p>I need your help , I am confused a little. </p>
  
  <p>My question is how SVG curveTo works, really I can't understand.</p>
  
  <p>look for this example </p>
  
  <pre><code>&lt;svg height="400" width="400"&gt;
   &lt;path d="M 200 90 C 200  90 0 0 90  300 " stroke="black" fill="none" stroke-width="3"/&gt;
  &lt;/svg&gt;
  </code></pre>
  
  <p>this code draws this shape</p>
  
  <p><img src="https://i.stack.imgur.com/dnPQw.png" alt="enter image description here"></p>
  
  <p>but really I can't understand how that done , I can't understand how the curve identified and what control points are and what 0 0 coordinate represents in my example.</p>