math(5)                          UNIX System V                          math(5)


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:





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math(5)                          UNIX System V                          math(5)


      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)












































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