NAME

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

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 ); double cabs(
        double x,
        double y ); float cabsf(
        float x,
        float y ); long double cabsl(
        long double x,
        long double y ); double fabs(
        double x ); float fabsf(
        float x ); long double fabsl(
        long double x );

LIBRARY

Math Library (libm)

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(), hypotf(), and hypotl() 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), hypotf(x,y) and hypotl(x,y) functions are defined as sqrt(x∗∗2 + y∗∗2). 

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

The fabs(), fabsf(), and fabsl() 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: