dc --version (return code: 0)
dc (GNU bc 1.06.95) 1.3.95
Copyright 1994, 1997, 1998, 2000, 2001, 2004, 2005, 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law.
dc --help (return code: 0)
Usage: dc [OPTION] [file ...]
-e, --expression=EXPR evaluate expression
-f, --file=FILE evaluate contents of file
-h, --help display this help and exit
-V, --version output version information and exit
Email bug reports to: bug-dc@gnu.org .