How do I use wc() in woocommerce?

Question

I'm working on using the wc() function in woocommerce. The documentation says it Returns the main instance of WC to prevent the need to use globals.

I can't find any examples of the use of this and I would like to know how to use wc() to do some basic things. I understand that it returns the main woocommerce instance; and from that I can extract all the data I would need; but I don't know the syntax for correct use ... might it be something like?

$foo = WC();
$bar = $foo->cart;
echo $bar;

could someone please correct this.

Also I am trying to understand what the advantages of doing it this way instead of globalizing variables.

Answer 1

as what the doc in your link says. 'prevent the need to use globals'. An example would be like this...

code using global.

global $woocommerce;
$customer_country = $woocommerce->customer->get_country();

code not using global

$customer_country = WC()->customer->get_country(); 
// some servers may not like like this... best is to use variables like $foo = WC(); then use $foo->customer->get_country()...

How to use WC() ? start here...

why must I avoid global?