math(3)

math(3erl)                 Erlang Module Definition                 math(3erl)

NAME
       math - Mathematical functions.

DESCRIPTION
       This  module  provides  an  interface to a number of mathematical func-
       tions.

   Note:
       Not all functions are provided on all  platforms.  In  particular,  the
       erf/1 and erfc/1 functions are not provided on Windows.

EXPORTS
       acos(X) -> float()

       acosh(X) -> float()

       asin(X) -> float()

       asinh(X) -> float()

       atan(X) -> float()

       atan2(Y, X) -> float()

       atanh(X) -> float()

       ceil(X) -> float()

       cos(X) -> float()

       cosh(X) -> float()

       exp(X) -> float()

       floor(X) -> float()

       fmod(X, Y) -> float()

       log(X) -> float()

       log10(X) -> float()

       log2(X) -> float()

       pow(X, Y) -> float()

       sin(X) -> float()

       sinh(X) -> float()

       sqrt(X) -> float()

       tan(X) -> float()

       tanh(X) -> float()

              Types:

                 Y = X = number()

              A collection of mathematical functions that return floats. Argu-
              ments are numbers.

       erf(X) -> float()

              Types:

                 X = number()

              Returns the error function of X, where:

              erf(X) = 2/sqrt(pi)*integral from 0 to X of exp(-t*t) dt.

       erfc(X) -> float()

              Types:

                 X = number()

              erfc(X) returns 1.0 - erf(X), computed  by  methods  that  avoid
              cancellation for large X.

       pi() -> float()

              A useful number.

LIMITATIONS
       As these are the C library, the same limitations apply.

Ericsson AB                       stdlib 3.13                       math(3erl)