NAME

math.h - mathematical declarations

 SYNOPSIS

#include <math.h>

 DESCRIPTION

The <math.h> header provides for the following constants. The values are of type double and are accurate within the precision of the double type.

M_E

Value of e

M_LOG2E

Value of log₂e

M_LOG10E

Value of log₁₀e

M_LN2

Value of log_e2

M_LN10

Value of log_e10

M_PI

Value of

M_PI_2

Value of /2

M_PI_4

Value of /4

M_1_PI

Value of 1/

M_2_PI

Value of 2/

M_2_SQRTPI

Value of 2/

M_SQRT2

Value of 2

M_SQRT1_2

Value of 1/2

The header defines the following symbolic constants:

MAXFLOAT

Value of maximum non-infinite single-precision floating point number.

HUGE_VAL

A positive double expression, not necessarily representable as a float. Used as an error value returned by the mathematics library. HUGE_VAL evaluates to positive infinity on systems supporting the ANSI/IEEE Std 754:1985 standard.

The following are declared as functions and may also be defined as macros. Function prototypes must be provided for use with an ISO C compiler.

double acos(double);
double asin(double);
double atan(double);
double atan2(double, double);
double ceil(double);
double cos(double);
double cosh(double);
double exp(double);
double fabs(double);
double floor(double);
double fmod(double, double);
double frexp(double, int *);
double ldexp(double, int);
double log(double);
double log10(double);
double modf(double, double *);
double pow(double, double);
double sin(double);
double sinh(double);
double sqrt(double);
double tan(double);
double tanh(double);
double erf(double);
double erfc(double);
double gamma(double);
double hypot(double, double);
double j0(double);
double j1(double);
double jn(int, double);
double lgamma(double);
double y0(double);
double y1(double);
double yn(int, double);
int    isnan(double);
double acosh(double);
double asinh(double);
double atanh(double);
double cbrt(double);
double expm1(double);
int    ilogb(double);
double log1p(double);
double logb(double);
double nextafter(double, double);
double remainder(double, double);
double rint(double);
double scalb(double, double);

The following external variable is defined:

extern int signgam;

 APPLICATION USAGE

None.

 FUTURE DIRECTIONS

None.

 SEE ALSO

acos(), acosh(), asin(), atan(), atan2(), cbrt(), ceil(), cos(), cosh(), erf(), exp(), expm1(), fabs(), floor(), fmod(), frexp(), hypot(), ilogb(), isnan(), j0(), ldexp(), lgamma(), log(), log10(), log1p(), logb(), modf(), nextafter(), pow(), remainder(), rint(), scalb(), sin(), sinh(), sqrt(), tan(), tanh(), y0().