On wordpress home page many sites are showing the post description or we can say the excerpt. For UI purpose some time we need to control the excerpt character limit. I already written about this in following article. But some people need the more advanced excerpt. Following code snippet will be helpful to you show the limit excerpt length by characters in wordpress.
First open your functions.php file and put following code in that file.
My name is Purab Kharat, Here is my Personal Blog: wpapi.com. Work as an Senior Technical Lead at Smartsourcing Global Pvt Ltd in Princeton, NJ, USA. I contributor of many wordpress plugins and Drupal Modules. I am core developer of Drupal. Connect to on LinkedIn or Follow @purab on Twitter or Follow me on Google+ or Write Mail to firstname.lastname@example.org or Chat with me on Skype : purabdk