Returns the base e raised to the power of the argument.

    Format

      #include  <math.h>

      double exp  (double x);

      float expf  (float x); (Integrity servers, Alpha)

      long double expl  (long double x); (Integrity servers, Alpha)

      double expm1  (double x); (Integrity servers, Alpha)

      float expm1f  (float x); (Integrity servers, Alpha)

      long double expm1l  (long double x);
                          (Integrity servers, Alpha)