title: How to convert string to raw string in dart
body: <p><strong>I want to convert an existing string to raw string.</strong></p>
  
  <p><strong>like:</strong></p>
  
  <pre><code>String s = "Hello \n World"
  </code></pre>
  
  <p>I want to convert this s variable to raw string(I want to print exact "Hello \n Wrold")</p>
  
  <p><strong>I need backslash(\) in output. I am trying to fetch string value from rest api. it have bunch of mathjax(latex) formula containing backslash.</strong></p>
  
  <p>Thanks</p>