Calc command line	Calc has the following command line:		calc [-h] [-q] [calc_command ...]		-h	print a help message  (equivalent to the			help command)		-q	By default, calc executes each file specified			in the :-separated list found in the environment			variable $CALCRC.  If $CALCRC does not exist,			an internal default is used.	If some calc_commands arguments are given on the command line,	calc executes these commands and then exists.  If no command	line arguments are given, calc prompts and reads commands	from standard input.