Name

hypot, hypotf, hypotl — Euclidean distance function

Synopsis

#include <math.h>
double hypot( double   x,
  double   y);
float hypotf( float   x,
  float   y);
long double hypotl( long double   x,
  long double   y);
[Note] Note
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
hypot(), hypotf(), hypotl():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _ISOC99_SOURCE;
or cc -std=c99
[Note] Note

Link with −lm.

DESCRIPTION

The hypot() function returns sqrt(x*x+y*y). This is the length of the hypotenuse of a right-angle triangle with sides of length x and y, or the distance of the point (x,y) from the origin.

CONFORMING TO

SVr4, 4.3BSD, C99. The float and long double variants are C99 requirements.

SEE ALSO

cabs(3), sqrt(3)

COLOPHON

This page is part of release 2.79 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/.


  Copyright 1993 David Metcalfe (davidprism.demon.co.uk)

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
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manual under the conditions for verbatim copying, provided that the
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Since the Linux kernel and libraries are constantly changing, this
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the use of the information contained herein.  The author(s) may not
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Formatted or processed versions of this manual, if unaccompanied by
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References consulted:
    Linux libc source code
    Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
    386BSD man pages
Modified 1993-07-24 by Rik Faith (faithcs.unc.edu)
Modified 2002-07-27 by Walter Harms
(walter.harmsinformatik.uni-oldenburg.de)