NAME

cbrt, sqrt - cube root, square root

SYNOPSIS

#include <math.h>

double cbrt(x)

double x;

double sqrt(x)

double x;

DESCRIPTION

Cbrt(x) returns the cube root of x.

Sqrt(x) returns the square root of x.

DIAGNOSTICS

Sqrt(negative) returns a NaN.

ERROR (due to Roundoff etc.)

Cbrt is accurate to within 0.7 ulps.

Sqrt on a machine that conforms to IEEE 754 is correctly
rounded in

accordance with the rounding mode in force; the error is
less than

half an ulp in the default mode (round-to-nearest). An ulp
is one

Unit in the Last Place carried.

SEE ALSO

libm(3)

AUTHOR

W. Kahan