title: float left and right make 2 column to be same height
body: <p>Why height 100% for the right floated column can't make it 100% height? Now i'm confused what 100% height really means.</p>
  
  <p><a href="https://jsfiddle.net/7ybLa9fj/" rel="nofollow noreferrer">https://jsfiddle.net/7ybLa9fj/</a></p>
  
  <p>How to make 2 column to have equal height if I'm using float?</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.wrap {
    height: 100%;
    overflow: hidden;
    width: 400px;
  }
  
  .left {
    float: left;
    width: 50%;
    background: #fafafa;
    text-align: center;
  }
  
  .right {
    float: right;
    background: #ccc;
    width: 50%;
    text-align: center;
    height: 100%; //make right has the same with left doesn't work
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="wrap"&gt;
    &lt;div class="left"&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
      &lt;p&gt;
        left content is long
      &lt;/p&gt;
  
    &lt;/div&gt;
    &lt;div class="right"&gt;right content is not&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>