hypot(3) Library Functions Manual hypot(3)
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); 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);
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 perpen-
dicular 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:
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Function Exceptional Argument Routine Behavior
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hypot(), hypotf(), hypotl() sqrt(x**2 + y**2)>max_float Overflow
cabs(), cabsf(), cabsl() sqrt(x**2 + y**2)>max_float Overflow
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The following table lists boundary values used by these functions:
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Value Data Hexadecimal Value Decimal Value
Name Type
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max_float S_FLOAT 7F7FFFFF 3.402823e38
T_FLOAT 7FEFFFFFFFFFFFFF 1.7976931348623e308
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hypot(3)