hypot(3)hypot(3)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 stan‐
dards 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 perpendicu‐
lar 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 excep‐
tional arguments:
────────────────────────────────────────────────────────────────────────────
Function Exceptional Argument Routine
Behavior
────────────────────────────────────────────────────────────────────────────
hypot(), hypotf(), hypotl() sqrt(x**2 + y**2)>max_float Overflow
cabs(), cabsf(), cabsl() sqrt(x**2 + y**2)>max_float Overflow
────────────────────────────────────────────────────────────────────────────
The following table lists boundary values used by these functions:
─────────────────────────────────────────────────────────────────
Value Name Data Type Hexadecimal Value Decimal Value
─────────────────────────────────────────────────────────────────
max_float S_FLOAT 7F7FFFFF 3.402823e38
T_FLOAT 7FEFFFFFFFFFFFFF 1.7976931348623e308
─────────────────────────────────────────────────────────────────
hypot(3)