Changing Extensions Using command Prompt

MS-DOS although not used now is a very powerful OS. Command prompt can do many things which even windows cant do and learning it has always been fun and I personally have always liked it.
To goto command prompt go to Start>Run and type cmd or press Win+R.
To rename a file in command prompt,type
ren <original file name><new file name>

To change the extension, type
ren <original file name.extension> <old file name.new extension>



Happy command prompting!!