html when to use a button and when to use an anchor tag code example

Example 1: html button click url

# Wrap whole button in a 'a' tag.
 <a href="https://google.com" class="button"><button class="pixel">Button text</button></a>

Example 2: button as href

<button onclick="location.href='http://www.example.com'" type="button">
         www.example.com</button>