Yes, you are right. If a domain is not registered then it can not have any pagerank. I taught that some of expired domains can still have pagerank but i think i

Yes, you are right. If a domain is not registered then it can not have any pagerank. I taught that some of expired domains can still have pagerank but i think i am wrong. But what if someone only wants to check the pagerank of a website? If I put one submit button, he needs to check the domain availability first then can check the pagerank. It breaks the simplicity i think. Thanks for the comments.