bc setting defaults

I have never really thought much about this, but for years whenever I start bc I always set the number of decimal points (scale) by issuing

scale=<number>

To automatically set this (and other settings) place them into a file (I called mine .bcrc) and set the environment variable BC_ENV_ARGS to point to this file.

BC_ENV_ARGS=$HOME/.bcrc

To set this variable up for every shell add to your shells start up files.