hypot, hypotf, hypotl - Euclidean distance function

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ hypot(), hypotf(), hypotl()                                                 │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       These  functions  return  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.

       The calculation is performed without undue overflow or underflow during the  intermediate  steps  of  the
       calculation.

       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.

       C99, POSIX.1-2001.

       The variant returning double also conforms to SVr4, 4.3BSD.

       Math library (libm, -lm)

       hypot, hypotf, hypotl - Euclidean distance function

       On  success, these functions return the length of the hypotenuse of a right-angled triangle with sides of
       length x and y.

       If x or y is an infinity, positive infinity is returned.

       If x or y is a NaN, and the other argument is not an infinity, a NaN is returned.

       If the result overflows, a  range  error  occurs,  and  the  functions  return  HUGE_VAL,  HUGE_VALF,  or
       HUGE_VALL, respectively.

       If  both  arguments  are  subnormal,  and  the result is subnormal, a range error occurs, and the correct
       result is returned.

cabs(3), sqrt(3)

Linux man-pages 6.9.1                              2024-05-02                                           hypot(3)

       C11, POSIX.1-2008.

#include<math.h>doublehypot(doublex,doubley);floathypotf(floatx,floaty);longdoublehypotl(longdoublex,longdoubley);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       hypot():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || _XOPEN_SOURCE
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

       hypotf(), hypotl():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE