Get public dns name of a ec2 instance using ec2 command line tools in bash

Question:

I have name of the a ec2 instance and want to do ssh to it. How can I figure out the ‘Public DNS’ of the ec2 instance using the ec2 instance name.

I want to do it using bash.

aws ec2 describe-instances --instance-ids i-12abc34 --query 'Reservations[].Instances[].PublicDnsName'

1 2	aws ec2 describe-instances --instance-ids i-12abc34 --query 'Reservations[].Instances[].PublicDnsName'

Where i-12abc34 is your instance id