How To Prevent Google From Indexing a Particular Blog Post?

I'm blogging at WordPress and I'm just wondering if it is possible to hide a particular post from search engine crawlers.
I am aware that it is possible but I don't know how. Do I have to access the Webmaster Tools or I can just get a plugin or such?

This code on the robots.txt will prevent any search engine to index that link. the robots.txt should be in the root of your site.


"your-post-link-here' depends upon the permalink type you've set.