how to change put a font into bold text in html code example

Example 1: how to bold text css inline

<p style="font-weight:bold">Hey there</p>

Example 2: html bold

<!--Emphasized bold text. It's for content that is of greater importance-->
<strong>I'm a content</strong>

<!--Bold text. It's used to draw attention to text without indicating that it's more important-->
<b>I'm another content</b>