NAME

hypot, cabs, fabs − Calculate Euclidean distance and absolute value

LIBRARY

Math Library (libm.a)

SYNOPSIS

#include <math.h>

double hypot  (double x, double y);
float  hypotf (float  x, float  y);
double cabs   (double x, double y);
float  cabsf  (float  x, float  y);
double fabs   (double x);
float  fabsf  (float  x);

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

hypot():  XPG4

fabs():  XPG4

Refer to the standards(5) reference page for more information about industry standards and associated tags. 

DESCRIPTION

The hypot() and hypotf() functions compute the length of the hypotenuse of a right triangle, where x and y represent the perpendicular sides of the triangle.  The hypot(x,y) and hypotf(x,y) functions are defined as sqrt(x∗∗2 + y∗∗2). 

The cabs() and cabsf() functions return the complex absolute value of x. The cabs() and cabsf() functions are defined as hypot() and hypotf(), respectively. 

The fabs() and fabsf() functions compute the absolute value of x. 

The following table describes function behavior in response to exceptional arguments:

The following table lists boundary values used by these functions: