std::expm1

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Defined in header <cmath>

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float       expm1( float arg );

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double      expm1( double arg );

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long double expm1( long double arg );

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double      expm1( Integral arg );

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Computes the e (Euler's number, 2.7182818) raised to the given power arg, minus Template:cpp. This function is more accurate than the expression Template:cpp if arg is close to zero.

Parameters

arg

-

floating point value

Return value

earg-1

If the result is too large for the underlying type, range error occurs and Template:cpp is returned.

See also

Template:cpp/numeric/math/dcl list expTemplate:cpp/numeric/math/dcl list exp2