title: Check exit status of function with itself exit status
body: <p>I have a function <code>ff</code> in <code>1.sh</code> with exit status <code>33</code>.
  When I call this function in <code>2.sh</code> and call function <code>ff</code> and if the exit status is <code>33</code>, then my <code>2.sh</code> is broken.
  How can I do a continue step?
  like this:</p>
  
  <pre><code>if [ exit_of_ff -ne 0 ]
  then
   continue
  fi
  </code></pre>