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Insert code snippets in Blogger using Prettyfy

If you want to insert code snippets with syntax-highlighting in your blogs on Blogger.com, then you can use google-code-prettify.
There are other syntax highlighting solutions out there, but this allows to do this very simply.
The steps are:
  1. Click on "Theme" (in LHS of blogger home page) or "Design" (in upper RHS corner).
  2. Click on "Edit HTML" button.
  3. Search for <head> tag in the html.
  4. Insert following line after meta tags in head tag:
    <script src='https://cdn.rawgit.com/google/code-prettify/master/loader/run_prettify.js?lang=scala&amp;lang=yaml&amp;lang=bash&amp;lang=xml&amp;lang=sql&amp;skin=sons-of-obsidian' type='text/javascript'></script>
    
    For me it is just before <title> tag.
  5. Add onload property to <body> tag:
    <body class='container' onload='prettyPrint()'>
    
  6. Here I have used "Sons-Of-Obsidian" style, you can use any of the available themes.
  7. Save the template.
  8. Now, in your Blog posts, whenever you want to insert code snippets, add the prettyprint class to your pre or code tags:
    <pre class="prettyprint linenums">
        var s:String = "Hello, World!";
    </pre>
    
  9. This will be rendered in your blog post as:
    var s:String = "Hello, World!";
    
For more details on using the Prettify, check-out its README.

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