term% cat index.txt EXP(3M) EXP(3M)
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 loga‐
rithm.
Pow returns xy.
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 a huge negative value when x is zero or negative; errno is
set to EDOM.
Sqrt returns 0 when x is negative; errno is set to EDOM.
EXP(3M)