Constants

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Built-in Constants

Constants built into R.

Keywords
sysdata
Usage
LETTERS
letters
month.abb
month.name
pi
Details

R has a small number of built-in constants.

The following constants are available:

  • LETTERS: the 26 upper-case letters of the Roman alphabet;

  • letters: the 26 lower-case letters of the Roman alphabet;

  • month.abb: the three-letter abbreviations for the English month names;

  • month.name: the English names for the months of the year;

  • pi: the ratio of the circumference of a circle to its diameter.

These are implemented as variables in the base namespace taking appropriate values.

References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

See Also

data, DateTimeClasses.

Quotes for the parsing of character constants, NumericConstants for numeric constants.

Aliases
  • Constants
  • LETTERS
  • letters
  • month.abb
  • month.name
  • pi
Examples
library(base) # NOT RUN { <!-- % earlier R versions said 1705, but most refs say 1706. --> # } # NOT RUN { ## John Machin (ca 1706) computed pi to over 100 decimal places ## using the Taylor series expansion of the second term of pi - 4*(4*atan(1/5) - atan(1/239)) ## months in English month.name ## months in your current locale format(ISOdate(2000, 1:12, 1), "%B") format(ISOdate(2000, 1:12, 1), "%b") # }
Documentation reproduced from package base, version 3.6.1, License: Part of R 3.6.1

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