MATH(5) DOMAIN/IX Reference Manual (SYS5) MATH(5)
NAME
math - math functions and constants
USAGE
#include <math.h>
DESCRIPTION
This file contains declarations of all the functions in the
Math Library (described in Section 3M), as well as various
functions in the C Library (Section 3C) that return
floating-point values. It defines the structure and con-
stants used by the error-handling mechanisms, including the
following constant used as an error-return value:
HUGE The maximum value of a single-precision
floating-point number. The following
mathematical constants are defined for
user convenience:
M_E The base of natural logarithms (e).
M_LOG2E The base-2 logarithm of BIR e .
M_LOG10E The base-10 logarithm of e.
M_LN2 The natural logarithm of 2.
M_LN10 The natural logarithm of 10.
M_PI The ratio of the circumference of a cir-
cle to its diameter. (There are also
several fractions of its reciprocal and
its square root.)
M_SQRT2 The positive square root of 2.
M_SQRT1_2 The positive square root of 1/2. For
the definitions of various machine-
dependent ``constants,'' see the
description of the header file.
FILES
/usr/include/math.h
RELATED INFORMATIOn
intro(3), values(5)
Printed 5/10/85 MATH-1