# cbrt(3m) [bsd man page]

```SQRT(3M)																  SQRT(3M)

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
On a VAX, sqrt(negative) returns the reserved operand and sets errno to EDOM .

ERROR (due to Roundoff etc.)
Cbrt is accurate to within 0.7 ulps.
Sqrt on a VAX is accurate to within 0.501 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.

math(3M), infnan(3M)

AUTHOR
W. Kahan

4.3 Berkeley Distribution					   May 12, 1986 							  SQRT(3M)```

## Check Out this Related Man Page

```SQRT(3) 						   BSD Library Functions Manual 						   SQRT(3)

NAME
cbrt, cbrtf, cbrtl, sqrt, sqrtf, sqrtl -- cube root and square root functions

LIBRARY
Math Library (libm, -lm)

SYNOPSIS
#include <math.h>

double
cbrt(double x);

float
cbrtf(float x);

long double
cbrtl(long double x);

double
sqrt(double x);

float
sqrtf(float x);

long double
sqrtl(long double x);

DESCRIPTION
The cbrt(), cbrtf(), and cbrtl() functions compute the cube root of x.

The sqrt(), sqrtf(), and sqrtl() functions compute the non-negative square root of x.

RETURN VALUES
The cbrt(), cbrtf(), and cbrtl() functions return the requested cube root.  The sqrt(), sqrtf(), and sqrtl() functions return the requested
square root unless an error occurs.  An attempt to take the sqrt() of negative x raises an invalid exception and causes an NaN to be returned
(except that the square root of -0 is valid and equal to -0.)