NAME

hypot − Euclidean distance

SYNOPSIS

cc [ flag ... ] file ... −lm [ library ... ]

#include <math.h>

double hypot(double x, double y);

MT-LEVEL

MT-Safe

DESCRIPTION

hypot(x,y) returns

sqrt(x∗x +y∗y),

taking precautions against unwarranted IEEE exceptions.  On IEEE overflow, hypot(x,y) may also set errno and call matherr(3M).  hypot(±∞,y) is +∞ for any y, even a NaN, and is exceptional only for a signaling NaN.

hypot(x,y) and atan2(y,x) (see trig(3M)) convert rectangular coordinates (x,y) to polar (r,θ); hypot(x,y) computes r, the modulus or radius.

SEE ALSO

matherr(3M), trig(3M)

SunOS 5.5.1  —  Last change: 4 Mar 1994