MATH(5-SVR4)        RISC/os Reference Manual         MATH(5-SVR4)



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 follow-
     ing 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:




                        Printed 11/19/92                   Page 1

MATH(5-SVR4)        RISC/os Reference Manual         MATH(5-SVR4)



     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).













































 Page 2                 Printed 11/19/92