how to add a background image in html on a web page code example

Example: how to set background image in html

<!-- Add image by a HTML element: -->
<div style="background-image: url('img.jpg');">

<!-- Add image by a <style> element: -->
<style>
div {
  background-image: url('img.jpg');
}
</style>

<!-- Add to the entire body: -->
<style>
body {
  background-image: url('img.jpg');
}
</style>