How do you differentiate between customers "Wants & Demands" Kindly give an easy example.?

Customers wants are items that fall within their repertoire of consumption observed from time. Their demand is the actual purchase or request of specific items that are verifiable.

demons of the customers means  consumer goods like food, water, shelter ,etc                                And wants of the customers means like a consumer have bread but they want to eat pizza this is the example of wants of the consumer