expm1,  log1p  -  exponential minus 1, logarithm of 1 plus
       argument


SYNOPSIS

       #include <math.h>

       double expm1 ( double x );

       double log1p ( double x );


DESCRIPTION

       expm1(x) returns a value equivalent to `exp (x) -  1'.  It
       is computed in a way that is accurate even if the value of
       x is near zero--a case where `exp (x) - 1' would be  inac­
       curate  due  to subtraction of two numbers that are nearly
       equal.

       log1p(x) returns a value equivalent to `log (1 +  x)'.  It
       is computed in a way that is accurate even if the value of
       x is near zero.


CONFORMING TO

       BSD


SEE ALSO

       exp(3), log(3)