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 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 0 when x is zero or negative; errno is set to EDOM. 

Sqrt returns 0 when x is negative; errno is set to EDOM. 

August 03, 1983  —  %W%%Q%%Y%