Installing Google Cloud SDK, what is the path to the rc file?

Question

https://cloud.google.com/sdk/docs/quickstart-mac-os-x

I downloaded the tar, and ran the install.sh

Next I got this message, however I don't see any rc / .rc file?

To update your SDK installation to the latest version [162.0.1], run: 
$ gcloud components update


Modify profile to update your $PATH and enable shell command 
completion?

Do you want to continue (Y/n)?  y                    

The Google Cloud SDK installer will now prompt you to update an rc 
file to bring the Google Cloud CLIs into your environment.

Enter a path to an rc file to update, or leave blank to use 
[/Users/leongaban/.zshrc]:  

Answer 1

Leon, the Cloud SDK installer provides you an option to update your $PATH as well as install shell completion for commands in the Cloud SDK. This is done by adding few lines to your shell startup script (commonly known as a rc file).

• Since you selected y to go forward with this step, the installer asks for the location of the rc file (i.e. shell startup script).
• It has detected that you use zsh and hence it gives you the default option to update this file /Users/leongaban/.zshrc.
• If instead you are using bash you would have to specify something like /Users/leongaban/.bashrc

You could also select n in the previous step and update $PATH and/or shell completion manually too.