Check out example codes for "change font in html". It will help you in understanding the concepts better.

Code Example 1

<p style="font-family:verdana">This is a paragraph.</p>
<p 
    style="font-family:'Courier New'">This is another paragraph.</p>

Code Example 2

<script>//for typewriter font:</script>

<tt>
  <h1>Example Text</h1
</tt>

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