Is there a way to chain calls in Bitcoin core console? Is there a way to chain calls in Bitcoin core client console window like this

validateaddress (getaccountaddress "")


instead of 

getaccountaddress ""
validateaddress _address from previous call_
You can use the $() syntax to execute another command and have it return its results:

validateaddress $(getaccountaddress "")

Here's the docs: http://www.gnu.org/software/bash/manual/html_node/Command-Substitution.html#Command-Substitution