WordPress Shortcode to Get Total Number of Categories

Here's a shortcode to get the total number of categories in WordPress:

Code for the shortcode

//Total Categories
function total_categories_count() {
    $categories = get_categories();
    return count($categories);
}
add_shortcode('total_categories', 'total_categories_count');

Wherever you want to display the total number of categories, you can simply use the [total_categories] shortcode.

How to add this code to your WordPress site