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)