@(#)exp.3 4.1 (Berkeley) 05/15/85
EXP 3M
.AT 3
NAME
exp, log, log10, pow, sqrt - exponential, logarithm, power, square root
SYNOPSIS
#include <math.h>double exp(x) double x;
double log(x) double x;
double log10(x) double x;
double pow(x, y) double x, y;
double sqrt(x) double x;
DESCRIPTION
Exp returns the exponential function of
x. Log returns the natural logarithm of x ; log10 returns the base 10 logarithm.
Pow returns x\u\s8y\s10\d.
Sqrt returns the square root of x.
SEE ALSO
hypot(3),
sinh(3),
intro(2)
DIAGNOSTICS
Exp and
pow return a huge value when the correct value would
overflow;
errno is set to ERANGE.
Pow returns 0 and sets
errno to
EDOM when the second argument is negative and non-integral and
when
both arguments are 0.
Log returns 0 when x is zero or negative; errno is set to EDOM.
Sqrt returns 0 when x is negative; errno is set to EDOM.