HYPOT(3) | Linux Programmer's Manual | HYPOT(3) |
NAME
hypot, hypotf, hypotl - Euclidean distance functionSYNOPSIS
#include<math.h>
double hypot(double x , double y );
float hypotf(float x , float y );
long double hypotl(long double x , long double y );
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or
cc -std=c99
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or
cc -std=c99
DESCRIPTION
The hypot() function returns sqrt( x* x+ y* y). This is the length of the hypotenuse of a right-angled triangle with sides of length x and y, or the distance of the point ( x, y) from the origin.RETURN VALUE
On success, these functions return the length of a right-angled triangle with sides of length x and y.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:
- Range error: result overflow
- errno is set to ERANGE. An overflow floating-point exception ( FE_OVERFLOW) is raised.
- Range error: result underflow
- An underflow floating-point exception ( FE_UNDERFLOW) is raised.
- These functions do not set errno for this case.
CONFORMING TO
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD.SEE ALSO
cabs(3), sqrt(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 |