title: How to split a list by comma not space
body: <p>I want to split a text with comma <code>,</code> not space <code></code> in <code>for foo in list</code>. Suppose I have a CSV file <code>CSV_File</code> with following text inside it:</p>
  
  <pre><code>Hello,World,Questions,Answers,bash shell,script
  ...
  </code></pre>
  
  <p>I used following code to split it into several words:</p>
  
  <pre><code>for word in $(cat CSV_File | sed -n 1'p' | tr ',' '\n')
  do echo $word
  done
  </code></pre>
  
  <p>It prints:</p>
  
  <pre><code>Hello
  World
  Questions
  Answers
  bash
  shell
  script
  </code></pre>
  
  <p>But I want it to split the text by commas not spaces:</p>
  
  <pre><code>Hello
  World
  Questions
  Answers
  bash shell
  script
  </code></pre>
  
  <p>How can I achieve this in bash?</p>