Originální popis anglicky:
sqrt, sqrtf, sqrtl - square root function
Návod, kniha: Linux Programmer's Manual
#include <math.h>
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.
SVID 3, POSIX, BSD 4.3, ISO 9899. The float and the long double variants are C99
requirements.
hypot(3)
