.\" Copyright (c) 1985 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"	@(#)sqrt.3m	6.2 (Berkeley) 5/12/86
.\"
.TH SQRT 3  "May 12, 1986"
.UC 6
.ds up \fIulp\fR
.SH NAME
sqrt, cbrt \- square root, cube root
.SH SYNOPSIS
.nf
.ft B
#include <math.h>

double sqrt(double \fIx\fP)
double cbrt(double \fIx\fP)
.ft R
.fi
.SH DESCRIPTION
Sqrt(x) returns the square root of x.
.PP
Cbrt(x) returns the cube root of x.
.SH DIAGNOSTICS
sqrt(\(+-0) = \(+-0 (exact)
.br
sqrt(Inf) = Inf
.br
sqrt(x) = NaN with invalid signal if x < 0.
.br
sqrt(NaN) = NaN with invalid signal for signaling NaN.
.SH SEE ALSO
.BR math (3).
.SH AUTHOR
W. Kahan