Configure ssh login information in config file

How to configure the ssh login information in Config file

Usually we connect the remote host using ssh by giving following command in terminal

$ssh -i filename.pem user@ipaddress 

(if there is the pem file for the security key)

Or

$ssh user@ipaddress

Instead of doing this we can add these information in Config file and just type in

$ssh <host>

The config file reside in .ssh/ folder as .ssh/config and add the following:
Host <HostName/AnyName>
HostName <ipaddress>
User <username>
IdentityFile <if there are any pem file> (Optional)

eg:
Host MyHost
HostName 192.168.1.101
User user