May 6, 1991 SQRT 3

### NAME

cbrt, cbrtf, sqrt, sqrtf - cube root and square root functions

### LIBRARY

Math Library (libm, -lm)

### SYNOPSIS

```double` cbrt(```double x`)
```float` cbrtf(```float x`)
```double` sqrt(```double x`)
```float` sqrtf(```float x`)

### DESCRIPTION

The cbrt(``) and cbrtf(``) functions compute the cube root of x.

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

### RETURN VALUES

If x is negative, sqrt(```x`) and sqrtf(```x`) set the global variable errno to EDOM.

### SEE ALSO

math(3)

### STANDARDS

The sqrt(``) function conforms to ANSI X3.159-1989 (``ANSI C89'') .

### HISTORY

The cbrt(``) function appeared in 4.3BSD.