log1p

   Computes ln(1+y) accurately.

   This function is supported on OpenVMS Integrity servers and
   Alpha only.

   Format

     #include  <math.h>

     double log1p  (double y);

     float log1pf  (float y);

     long double log1pl  (long double y);
 

Additional information available:

Argument        Description     Return_Values