pi

Compute decimal Archimedes' constant Pi on the command line. More information: http://manpages.ubuntu.com/manpages/trusty/man1/pi.1.html.

Display 100 decimal digits of Archimedes' constant Pi:

pi

Display a specified number of decimal digits of Archimedes' constant Pi:

pi {{number}}

Display help:

pi --help

Display version:

pi --version

Display recommended readings:

pi --bibliography