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```SCALBN(3)                BSD Library Functions Manual                SCALBN(3)

NAME
scalbn, scalbnf, scalbnl -- exponent using FLT_RADIX

LIBRARY
Math Library (libm, -lm)

SYNOPSIS
#include <math.h>

double
scalbn(double x, int n);

float
scalbnf(float x, int n);

long double
scalbnl(long double x, int n);

DESCRIPTION
The scalbn(), scalbnf(), and scalbnl() functions compute x * r^n, where r
is the radix of the machine's floating point arithmetic, defined by the
FLT_RADIX constant in <float.h>.  The rationale is efficiency; r^n is not
computed explicitly.

RETURN VALUES
As described above, upon successful completion, the described functions
return the exponent computed using FLT_RADIX.  Otherwise the following
may occur:

1.   When the result would cause an overflow, a range error occurs
and +-HUGE_VAL, +-HUGE_VALF, or +-HUGE_VALL is returned
according to the sign of x and the return type of the
corresponding function.

2.   When the correct value would cause an underflow and it is not
representable, a range error occurs and either 0.0 or an
implementation-defined value is returned.  When an underflow
occurs but the correct value is representable, a range error
occurs but the correct value is returned.

3.   If x is +-0 or +-Inf, x is returned.  Likewise, if n is zero,
x is returned.  If x is NaN, NaN is returned.

exp(3), frexp(3), ldexp(3), math(3)

STANDARDS
The described functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD                           September 18, 2011                           BSD
```

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS