SQRT(3) Linux Programmers Manual SQRT(3)
sqrt, sqrtf, sqrtl - square root function
double sqrt(double x);
float sqrtf(float x);
long double sqrtl(long double x);
Link with -lm.
The sqrt() function returns the non-negative square root of x. It
fails and sets errno to EDOM, if x is negative.
EDOM x is negative.
SVr4, 4.3BSD, C89. The float and long double variants are C99 require
cbrt(3), csqrt(3), hypot(3)
This page is part of release 3.05 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.