hypot(3m) — VAX
Name
hypot, cabs − Euclidean distance
Syntax
#include <math.h>
double hypot(x,y)
double x,y;
double cabs(z)
struct {double x,y;} z;
Description
The hypot and cabs functions return
sqrt(x*x + y*y),
taking precautions against unwarranted overflows.
Return Values
The hypot and cabs functions return HUGE_VAL and sets errno to ERANGE when the correct value would overflow.
Environment
When your program is compiled using the System V environment, if the correct value would overflow, hypot returns HUGE and sets errno to ERANGE.
These error-handling procedures may be changed with the function matherr(.).
The cabs subroutine does not exist in the System V environment. For sqrt, see exp(.).