Google Analytics tracking via Child Theme

example.php

<!-- Example with code -->
<!-- Hook-->
add_action( 'wp_head', 'ga_google_analytics', 10 );
function da_google_analytics() { ?>
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-xxxxxxxxx-x"> 
</script>
<script> 
// Paste your Google Analytics tracking script here
    window.dataLayer = window.dataLayer || [];
    function gtag(){dataLayer.push(arguments);}
    gtag('js', new Date());
    gtag('config', 'UA-xxxxxxxxx-x');
// Tracking Script - End
  </script>
  <?php
  }

functions.php

add_action('wp_head', 'wpb_add_googleanalytics');
function ga_add_googleanalytics() { ?>

// Paste your Google Analytics code here
<!-- Global site tag (gtag.js) - Google Analytics -->

<?php } ?>