title: Surprising simple operation results
body: <p>In JavaScript, I tried executing the below statements</p>
  
  <pre><code>var x = 1+"2"-3; //Anser is 9.
  var y = 1-"2"+4 //Anser is 3.
  </code></pre>
  
  <p>For such operations, what is converted to what?</p>
  
  <p>I guess <code>1+"2" = 12(number)</code> and then <code>12-3</code>?</p>