You can check the version of your WordPress using a few different methods:
- WordPress Dashboard
When you login to your WordPress Administrative dashboard, you will see the WordPress version in the At a Glance admin widget. - Version.php file
You can check the wp-includes/version.php file using cPanel File Manager or FTP and you will see the version listed under $wp_version line. - WP-CLI Command Line
You can use the WordPress command line interface (WP-CLI) from SSH, simply navigate to your WordPress installation directory and run this command
wp core version
This will output the current version of WordPress installed.