What does the -q switch do?

[ghost]

I have seen calc -q -f is used to execute .calc scripts. But I don't know exactly what the -q switch does. -f seems to be reading from file and I'm pretty sure about that. But I have no idea about -q. I tried to omit -q and the script still runs as expected.

[lcn2]

For the record, calc -q, as documented in the calc man page:

       -q     Disable the reading of the startup scripts.

              This allows the script to run independently of startup scripts
              such those managed by the $CALCRC environment variable.  For
              example, this will disable the use of the common calcrc file
              (usually ~/.calcrc).