redhat man page for sqrt

SQRT(3) 						     Linux Programmer's Manual							   SQRT(3)

NAME
       sqrt - square root function

SYNOPSIS
       #include <math.h>

       double sqrt(double x);

DESCRIPTION
       The sqrt() function returns the non-negative square root of x.  It fails and sets errno to EDOM, if x is negative.

ERRORS
       EDOM   x is negative.

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       hypot(3)

								    1993-06-21								   SQRT(3)