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.