Floating point is always available; say a little about what it is.
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@ -201,9 +201,10 @@ leading @samp{+} or a final @samp{.}.
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@node Floating Point Type
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@subsection Floating Point Type
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Emacs supports floating point numbers (though there is a compilation
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option to disable them). The precise range of floating point numbers is
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machine-specific.
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Floating point numbers are the computer equivalent of scientific
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notation. The precise number of significant figures and the range of
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possible exponents is machine-specific; Emacs always uses the C data
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type @code{double} to store the value.
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The printed representation for floating point numbers requires either
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a decimal point (with at least one digit following), an exponent, or
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