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EXPM1

Section: Linux Programmer's Manual (3)
Updated: 1995-09-16
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NAME

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 inaccurate 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

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