title: How to leave the ' ' in the result of a function in javascript
body: <pre><code>function concatString(val1, val2) {
    return val1 + &quot; &quot; + val2
    }
  </code></pre>
  <p>Examples:</p>
  <pre><code>('test', 'ok') =&gt; 'test ok';
  
  ('test', ' ') =&gt; 'test ';
  </code></pre>