NAME

math - math functions and constants

SYNOPSIS

#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 constants used by the matherr(3M) error-handling mechanisms, including the following constant used as a 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 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           J, the ratio of the       circumference of a circle
               to its diameter.

M_PI_2 J/2.

M_PI_4 J/4.

M_1_PI 1/J.

M_2_PI 2/J.

M_2_SQRTPI 2/\/J.

M_SQRT2 The positive square root of 2.

M_SQRT1_2 The positive square root of 1/2. The following mathematical constants are also defined in this header file:

MAXFLOAT The maximum value of a non-infinite single-precision floating point number.

HUGE_VAL positive infinity. For the definitions of various machine-dependent constants, see values(5).

SEE ALSO

intro(3), matherr(3M), values(5).