how to add product category programatically in woocomerce code example

Example 1: is product category woocommerce

if( is_product_category() ) {
	// yay, we are on a product category page!
} else {
 
}

Example 2: is product category woocommerce

if( has_term( 4, 'product_cat' ) ) {
	// do something if current product in the loop is in product category with ID 4
}