(guile.info.gz) Conversion

 
 21.2.9 Converting Numbers To and From Strings
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  -- Scheme Procedure: number->string n [radix]
  -- C Function: scm_number_to_string (n, radix)
      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.
 
  -- Scheme Procedure: string->number string [radix]
  -- C Function: scm_string_to_number (string, radix)
      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' returns `#f'.

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