Editing Dc (computer program) (section)

{{Short description|Cross-platform reverse-Polish calculator program}}
{{lowercase|title=dc (Unix)}}
{{Infobox software
| name                   = dc
| logo                   = 
| screenshot             = 
| screenshot size        = 
| caption                = 
| author                 = [[Lorinda Cherry]], [[Robert Morris (cryptographer)|Robert Morris]]<br />([[AT&T Bell Laboratories]])
| developer              = Various [[open-source software|open-source]] and [[commercial software|commercial]] developers
| released               = 
| latest release version = 
| latest release date    = 
| programming language   = [[B (programming language)|B]]
| operating system       = [[Unix]], [[Unix-like]],  [[Plan 9 from Bell Labs|Plan 9]]
| platform               = [[Cross-platform]]
| genre                  = [[Command (computing)|Command]]
| license                = 
| website                = 
}}
'''dc''' (''desk calculator'') is a [[cross-platform]] [[reverse Polish notation|reverse-Polish]] calculator which supports [[arbitrary-precision arithmetic]].<ref>{{man|1|dc|die.net|an arbitrary precision calculator}}</ref> It was written by [[Lorinda Cherry]] and [[Robert Morris (cryptographer)|Robert Morris]] at [[Bell Labs]].<ref name="reader" /> It is one of the oldest [[Unix]] utilities, preceding even the invention of the [[C (programming language)|C programming language]]. Like other utilities of that vintage, it has a powerful set of features but terse syntax.<ref>{{cite web
|url=http://plan9.bell-labs.com/7thEdMan/vol2/dc
|title=The sources for the manual page for 7th Edition Unix dc
|access-date=2004-06-23
|archive-date=2004-08-23
|archive-url=https://web.archive.org/web/20040823221918/http://plan9.bell-labs.com/7thEdMan/vol2/dc
|url-status=dead
}}</ref><ref>{{cite web
|author=Ritchie, Dennis M. 
|date=Sep 1979 
|url=http://cm.bell-labs.com/cm/cs/who/dmr/hist.html 
|title=The Evolution of the Unix Timesharing System 
|url-status=dead 
|archive-url=http://webarchive.loc.gov/all/20100506231949/http://cm.bell-labs.com/cm/cs/who/dmr/hist.html
|archive-date=2010-05-06
}}</ref>
Traditionally, the [[bc (programming language)|bc]] calculator program (with [[infix notation]]) was implemented on top of dc, now the implementation of GNU dc bases on bc.<ref>{{cite web
|url=https://www.gnu.org/software/bc/
|title=GNU bc
|access-date=2025-01-25
}}</ref>

This article provides some examples in an attempt to give a general flavour of the language; for a complete list of commands and syntax, one should consult the [[man page]] for one's specific implementation.