How to map a subdomain to Blogger blog using 301 redirect ?

 I will take Godaddy for demonstration.

Steps :

1.Visit DNS management portal.

2.Click on Forwarding tab Adjacent to DNS

3.Enter subdomain like blog which you want to map/redirect and in next tab enter the address of your blog.

4.Select Permanent(301) redirect.

5.Click Save and you are done, wait for ~1 min to see effects.