How we can add "buy now" on our templete file from wordpress woocommerce plugin? -

i need add buy now button every product took user paypal page or checkout page. inside woocommerce documentation, i'm unable find shortcode or filter. appreciated.

thanks in advance.

i used following code in theme's functions.php file:

    add_action('woocommerce_after_add_to_cart_button','nom_buy_now_after_add_to_cart_button');      function nom_buy_now_after_add_to_cart_button(){         function nom_buy_now_after_add_to_cart_button(){      ?>     <script type="text/javascript">         jquery(document).ready(function($){              $('.buy-now').on('click',function(e){                 $('#buy-now-field').val('1');             });         });     </script>     <input type="hidden" name="nom_buy_now_field" id="buy-now-field" value="">     <?php     echo '<button type="submit" data-product-id="'.get_the_id().'" class="button buy-now" style="margin-left:4px;">'. apply_filters('nom_woocommerce_buy_now_button_text', 'buy now') .'</button>'; }         echo '<button type="submit" data-product-id="'.get_the_id().'" class="button buy-now" style="margin-left:4px;">'. apply_filters('nom_woocommerce_buy_now_button_text', 'buy now') .'</button>';     } add_filter ('add_to_cart_redirect', 'nom_buy_now_after_add_to_cart_redirect_to_checkout');      function nom_buy_now_after_add_to_cart_redirect_to_checkout() {         global $woocommerce;          $checkout_url = $woocommerce->cart->get_checkout_url();             if( isset($_request['nom_buy_now_field']) ){             return $checkout_url;         }     }