want to put adsense in my wordpress blog

Just copy the code from Adsense, and paste it into the sidebar or template file where you want it to appear. These are in your /wp-content/themes/yourthemename directory, where “yourthemename” is…er…the name of your theme. ??

Hi,
thanks for your comment.but the blog is not hosted in my domain.it is hosted with wordpress.com(https://pinakihit.wordpress.com).so how can i get access to their file system?

Hi,
thanks for your comment.but the blog is not hosted in my domain.it is hosted with wordpress.com(https://pinakihit.wordpress.com).so how can i get access to their file system?

Thanks,
Pinaki

ads are not allowed on wordpress.com blogs.
https://faq.wordpress.com/2005/12/08/adsense/

support for wordpress.com blogs should be directed at the wordpress.com support forums.
https://en.forums.wordpress.com/