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# std::scalbn, std::scalbln

From cppreference.com
< cpp‎ | numeric‎ | math

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()

### [edit] Parameters

arg | - | floating point value
exp | - | integer value

### [edit] Return value

Returns `x×FLT_RADIXexp`.

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

### [edit] See also

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

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