sqrt,
sqrtf
[positive square root]
SYNOPSIS
#include <math.h> double sqrt(double x); float sqrtf(float x);
DESCRIPTION
sqrt
computes the positive square root of
the argument. You can modify error handling for this function with matherr.
RETURNS
On success, the square root
is returned. If x
is real and positive, then the result
is positive. If x
is real and negative, the global value
errno
is set to EDOM
(domain error).
COMPLIANCE
sqrt
is ANSI C. sqrtf
is an extension.