how to change add to cart button in wordpress

1// To change add to cart text on single product page
2add_filter( 'woocommerce_product_single_add_to_cart_text', 'woocommerce_custom_single_add_to_cart_text' ); 
3function woocommerce_custom_single_add_to_cart_text() {
4    return __( 'Buy Now', 'woocommerce' ); 
5}
6
7// To change add to cart text on product archives(Collection) page
8add_filter( 'woocommerce_product_add_to_cart_text', 'woocommerce_custom_product_add_to_cart_text' );  
9function woocommerce_custom_product_add_to_cart_text() {
10    return __( 'Buy Now', 'woocommerce' );
11}