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std::scalbn, std::scalbln

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Common mathematical functions
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scalbnscalbln
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Defined in header <cmath>
float       scalbn( float x, int exp );
(since C++11)
double      scalbn( double x, int exp );
(since C++11)
long double scalbn( long double x, int exp );
(since C++11)
double      scalbn( Integral x, int exp );
(since C++11)
float       scalbln( float x, long exp );
(since C++11)
double      scalbln( double x, long exp );
(since C++11)
long double scalbln( long double x, long exp );
(since C++11)
double      scalbln( Integral x, long exp );
(since C++11)

Multiplies an floating point value x by FLT_RADIX raised to power exp. On binary system it is equivalent to std::ldexp()

Parameters

arg - floating point value
exp - integer value

Return value

Returns x×FLT_RADIXexp.

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

See also

decomposes a number into significand and a power of 2
(function) [edit]
multiplies a number by 2 raised to a power
(function) [edit]