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hypot, hypotf---distance from origin

Synopsis 
#include <math.h>
double hypot(double x, double y);
float hypotf(float x, float y);
Description
hypot calculates the Euclidean distance between the origin (0,0) and a point represented by the Cartesian coordinates (x,y). hypotf differs only in the type of its arguments and result.


Returns
Normally, the distance value is returned. On overflow, hypot returns HUGE_VAL and sets errno to ERANGE.

You can change the error treatment with matherr.


Portability
hypot and hypotf are not ANSI C.

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