Shopify: Crate a Simple Add To Cart Button and Redirect it Directly to the Checkout Page

My knowledge of Shopify is little, but did some little works in Shopify which were little and JQuery and CSS based Job. I am sharing you a piece of code which can help anyone using shopify to create a simple Add To Cart button and put it anywhere and make it redirect to checkout page. Here is the code:

<form  class="product-form" action="/cart/add" data-productid="PRODUCT ID"  method="post"> 
  <input type="hidden" name="id" data-productid="PRODUCT ID" class="product-select" value="VARIANT ID" data-variant-title="VARIANT TITLE" />
  <input type="submit" value="Add To Cart" class="btn btn btn-default" />
<input type="hidden" name="return_to" value="/checkout/" />
</form>