how to put image in the background css code example

Example 1: How to set a image as a backgroung image

<style>
body {
  background-image: url('img_girl.jpg');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}
</style>

Example 2: make image background of div

background-image: url("photographer.jpg");