title: How to negate an evaluation/expression in helm?
body: <p>I have bash commands that copies files and folders to a target directory. After all files/folders are copied, I need to check if I need to delete a specific folder. If <code>false</code>, delete the directory. In helm, how do I negate the boolean <code>true</code> or <code>false</code></p>
  <p>Something like:</p>
  <pre><code>{{- if not .Values.copyExamples }}
      --delete the files
  {{- end }}
  </code></pre>