block websites without using any software

This is very easy to block website you have to do only small changes in the "hosts" file with is present in the

"C:\Windows\System32\drivers\etc" pasth.(Windows)

Step 1:

Open host file and add this line to the end of the file "127.0.0.1           example.com" . example.com is the website name you want to block.

Step 2:

type all the possible way to write the website for example.

127.0.0.1           example.com

127.0.0.1           www.example.com

127.0.0.1           http://example.com

127.0.0.1           http://www.example.com

127.0.0.1           http://example.com

127.0.0.1           https://www.example.com

Step 3:

save the file. (some time file is not able to save then save as that file on desktop and cut it from desktop and paste into "C:\Windows\System32\drivers\etc" directory)

OR you can make software to block website using this method in c++,java by Using file input ,output stream.