The following procedures read and write numbers according to their
external representation as defined by R5RS (see R5RS Lexical Structure in The Revised^5 Report on the Algorithmic
Language Scheme). See the
i18n) module, for locale-dependent number parsing.
Return a string holding the external representation of the number n in the given radix. If n is inexact, a radix of 10 will be used.
Return a number of the maximally precise representation
expressed by the given string. radix must be an
exact integer, either 2, 8, 10, or 16. If supplied, radix
is a default radix that may be overridden by an explicit radix
prefix in string (e.g. "#o177"). If radix is not
supplied, then the default radix is 10. If string is not a
syntactically valid notation for a number, then
string->number above, but taking a C string, as pointer
and length. The string characters should be in the current locale
locale in the name refers only to that, there’s no