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 hypot()                 Calculate the Hypotenuse of a Right Triangle

 #include   <math.h>

 double     hypot(x,y);
 double     x,y;                         Floating-point values

    hypot() computes the hypotenuse of a right triangle with sides of
    length 'x' and 'y'.  This is the equivalent of:

                       sqrt('x' * 'x' + 'y' * 'y');

       Returns:     The length of the hypotenuse.  On overflow, matherr()
                    is called with an overflow error, 'errno' (defined in
                    <errno.h>) is set to ERANGE (defined in <errno.h>),
                    and the value 'HUGE_VAL' (defined in <math.h>) is
                    returned.

         Notes:     Error handling can be modified with the matherr()
                    routine.

   -------------------------------- Example ---------------------------------

    The following statements calculate the length of the hypotenuse of a
    right triangle with two sides of length 7.0 and 24.0:

           #include <math.h>     /* for hypot() */

           main()
           {
               double h;

               h = hypot(7.0, 24.0);    /* h = 25.0 */
           }