MATH(5)              INTERACTIVE UNIX System              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 follow-
               ing constant used as an 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.

               For the definitions of various machine-dependent ``con-
               stants,'' see the description of the <values.h> header file.

          SEE ALSO


          Rev.                                                       Page 1

          MATH(5)              INTERACTIVE UNIX System              MATH(5)



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






















































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