title: How to pass null data to String field in cucumber feature file?
body: <p>Feature: login</p>
  
  <p>Scenario Outline: validate userid</p>
  
  <pre><code>Given launch gmail site
  </code></pre>
  
  <p>Then validate userid with "" criteria</p>
  
  <pre><code>When enter password as "&lt;z&gt;"
  
  And click pwd button
  
  Then validate password with "&lt;b&gt;" criteria
  
  And close site
  
  Examples: 
    | x            | y       | z            | b       |
    | a            | valid   | 888654554    | valid   |
    |  b           | valid   |              | invalid |
    |              | invalid |              |         |
  </code></pre>