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}
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}
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\note{
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\note{
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  When a string is parsed to input a numeric constant, the number may or
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  When a string is parsed to input a numeric constant, the number may or
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  may not be representable exactly in the C double type used.  If not
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  may not be representable exactly in the C double type used.  If not
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  one of the nearest representable numbers will be returned.
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  one of the nearest representable numbers will be returned.
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  \R's own C code is used to convert constants to binary numbers, so the
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  \R's own C code is used to convert constants to binary numbers, so the
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  effect can be expected to be the same on all platforms implementing
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  effect can be expected to be the same on all platforms implementing
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  full IEC 600559 arithmetic (the most likely area of difference being
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  full IEC 600559 arithmetic (the most likely area of difference being
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  the handling of numbers less than \code{\link{.Machine}$double.xmin}).
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  the handling of numbers less than \code{\link{.Machine}$double.xmin}).
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  The same code is used by \code{\link{scan}}.  } \seealso{
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  The same code is used by \code{\link{scan}}.  } \seealso{