SQRT(3) | Linux Programmer's Manual | SQRT(3) |
NAME
sqrt, sqrtf, sqrtl - square root functionSYNOPSIS
#include<math.h>
double sqrt(double x );
float sqrtf(float x );
long double sqrtl(long double x );
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or
cc -std=c99
DESCRIPTION
The sqrt() function returns the nonnegative square root of x.RETURN VALUE
On success, these functions return the square root of x.ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.The following errors can occur:
- Domain error: x less than -0
- errno is set to EDOM. An invalid floating-point exception ( FE_INVALID) is raised.
CONFORMING TO
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.SEE ALSO
cbrt(3), csqrt(3), hypot(3)COLOPHON
This page is part of release 3.53 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/.2010-09-20 |