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   hypot

   Usage
   #include <math.h>
   double hypot(double x,double y);

   Description
   Calculates the length of the hypotenuse of a right triangle with sides
   of length x and y. The hypotenuse is the value obtained by taking  the
   square root of the sums of the squares of x and y (sqrt(x*x+y*y)).

   Example
   #include <stdio.h>
   #include <math.h>
   main()
   {
   double x,y;
        printf("Enter floating point x: ");
        scanf("lf",&x);
        printf("Enter floating point y: ");
        scanf("lf",&y);
        printf("The hypotenuse of [%f, %f] is [%f]\n",x,y,hypot(x,y));
   }

   Return Value
   The hypotenuse of a triangle with sides x and y.