06-19-2013
Please let me know what i need to correct.
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LEARN ABOUT NETBSD
scalbnl
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 follow-
ing 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 implementa-
tion-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.
SEE ALSO
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