Syntax highlighting makes code easier to read

prismjs.com basic usage guide > click here.
Settings for syntax highlighting via Prism.js.

When adding the code, script or what ever.
Type it like this:

<pre><code class=”language-swift”>
// The <pre> tag is used if wrapping multi line code
import Swift
print(“Hello World!”)
</code></pre>

Which then becomes this:

import Swift
print("Hello World!")