std::log1p

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Defined in header <cmath>

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float       log1p( float arg );

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double      log1p( double arg );

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long double log1p( long double arg );

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double      log1p( Integral arg );

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Computes the natural (base Template:cpp) logarithm of Template:cpp. This function is more precise than the expression Template:cpp if arg is close to zero.

Parameters

arg

-

floating point value

Return value

ln(1+arg)

Domain error occurs if arg is negative. Template:cpp is returned in that case.

Range error occurs if arg is Template:cpp. Template:cpp is returned in that case.

See also

Template:cpp/numeric/math/dcl list logTemplate:cpp/numeric/math/dcl list log10