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 π, the ratio of the circumference of a circle to its diameter. 

M_PI_2 π/2. 

M_PI_4 π/4. 

M_1_PI 1/π. 

M_2_PI 2/π. 

M_2_SQRTPI 2/√π. 

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)

SunOS 5.5/x86  —  Last change: 3 Jul 1990