Bootstrap allows you to display code with two different key ways −
The first is the <code> tag. If you are going to be displaying code inline, you should use the <code> tag.
Second is the <pre> tag. If the code needs to be displayed as a standalone block element or if it has multiple lines, then you should use the <pre> tag.
Make sure that when you use the <pre> and <code> tags, you use the unicode variants for the opening and closing tags − < and >.
Let us see an example below −
<p><code><header></code> is wrapped as an inline element.</p> <p>To display code as a standalone block element use <pre> tag as:</p> <pre> <article> <h1>Article Heading</h1> </article> </pre>