finding the public and private ip addresses

To find the public ip address, i took the number from the dns name, removed teh dashes adn inserted '.'s. ec2-75-101-229-61.compute-1.amazonaws.com became 75.101.229.61. to find the private ip address, i logged onto the box and typed ifconfig. the first address that looked like an ip address was my private ip address. mine started iwth a 10.