log2(3M)log2(3M)NAMElog2(), log2f(), log2l(), log2w(), log2q() - logarithm base two func‐
tions
SYNOPSIS
HP Integrity Server Only
DESCRIPTION
returns the logarithm base two of x.
is a version of it takes a argument and returns a result.
Integrity Server Only
is a version of it takes a argument and returns a result.
is an version of it takes an argument and returns an result.
is equivalent to on HP-UX systems.
USAGE
To use these functions, compile either with the default option or with
the and options.
To use (for Integrity servers) or compile also with the option.
Make sure your program includes and link in the math library by speci‐
fying on the compiler or linker command line.
For more information, see the at the following site:
RETURN VALUE
If x is +INFINITY, returns +INFINITY.
If x is zero, returns (equal to −INFINITY) and raises the divide-by-
zero exception.
If x is less than zero, returns NaN and raises the invalid exception.
If x is NaN, returns NaN.
raises the inexact exception whenever a rounded result does not equal
the mathematical result.
ERRORS
If x is less than zero, sets to [EDOM].
Integrity Server Only
HP-UX functions on Integrity servers do not set by default. For set‐
ting, compile with the option.
SEE ALSOexp(3M), exp10(3M), log(3M), log1p(3M), log2(3M), pow(3M), math(5).
STANDARDS CONFORMANCE
: ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arith‐
metic'')
log2(3M)