exp(3M)

NAME

     exp - exponential function

SYNOPSIS

     cc [ flag ... ] file ... -lm [ library ... ]
     #include <math.h>

     double exp(double x);

DESCRIPTION

     The exp() function computes the exponential of x, defined as
     e**x.

RETURN VALUES

     Upon successful completion, exp() returns the exponential of
     x.

     If the correct value would  cause  overflow,  exp()  returns
     HUGE_VAL and sets errno to ERANGE.

     If the correct value would cause underflow  to  zero,  exp()
     returns  0 and may set errno to ERANGE.

     If x is  NaN, NaN is returned.

     For exceptional cases, matherr(3M) tabulates the  values  to
     be returned as dictated by Standards other than XPG4.

ERRORS

     The exp() function will fail if:

     ERANGE
           The result overflows.

     The exp() function may fail if:

     ERANGE
           The result underflows.

USAGE

     An application wishing to check for error situations  should
     set  errno  to  0 before calling exp(). If errno is non-zero
     on return,  or  the  return  value  is   NaN  an  error  has
     occurred.

ATTRIBUTES

     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|

SEE ALSO

     isnan(3M),  log(3M),  matherr(3M),  mp(3MP),  attributes(5),
     standards(5)

NOTES

     Prior to Solaris 2.6,  there was a conflict between the  pow
     function  in this library and the  pow function in the libmp
     library. This conflict was resolved by prepending mp_ to all
     functions in the libmp library. See  mp(3MP) for details.