LOG1P(3)

NAME
1.35 `log1p', `log1pf'--log of `1 + X'

SYNOPSIS
     #include <math.h>
     double log1p(double X);
     float log1pf(float X);

DESCRIPTION
`log1p' calculates the natural logarithm of `1+X'. You can use `log1p' rather than ``log(1+X)'' for greater precision when X is very small.
   `log1pf' calculates the same thing, but accepts and returns `float' values rather than `double'.

RETURNS
`log1p' returns a `double', the natural log of `1+X'. `log1pf' returns a `float', the natural log of `1+X'.

PORTABILITY
Neither `log1p' nor `log1pf' is required by ANSI C or by the System V Interface Definition (Issue 2).

SEE ALSO
log1p is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.