// Bob Myers
// 
// Simple set of function call examples using the Math library function
//  sqrt()

import static java.lang.Math.sqrt;

public class Sqrt2
{

  public static void main(String[] args)
  {
    double x = 9.0, y = 16.0, z;

    z = sqrt(36.0);	// sqrt returns 6.0 (gets stored in z)
    System.out.printf("z = %.1f\n", z);

    z = sqrt(x);		// sqrt returns 3.0 (gets stored in z)
    System.out.printf("z = %.1f\n", z);

    z = sqrt(x + y);	// sqrt returns 5.0 (gets stored in z) 
    System.out.printf("z = %.1f\n", z);

    // sqrt returns 10.0, which gets printed
    System.out.printf("Square root of 100: %.1f\n", sqrt(100.0));

    // because of automatic type conversion rules we can send an int where a 
    //  double is expected.  This call returns 7.0
  //  System.out.printf("sqrt(49) returns %.1f\n", sqrt(49));

    // in this last one, sqrt(625.0) returns 25.0, which gets sent as the
    //  argument to the outer sqrt call.  This one returns 5.0, which gets
    //  printed
    System.out.printf("sqrt(sqrt(625.0)) = %.1f\n",
            sqrt(sqrt(625.0)) );

  }

}