Built-in Constants

Usage

LETTERS
letters
month.abb
month.name
pi

Value

R has a limited number of built-in constants (there is also a rather larger library of data sets which can be loaded with the function data).

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.

See Also

data.

Examples

  all(nchar(letters) == 1)                    # TRUE
  all(month.abb == substr(month.name, 1, 3))  # TRUE

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