/** Examples of operations on primitive Java data types
 **/

public class Example1 {

  public static void main (String [] args ) {

    Example1 instance = new Example1();

    // Assumes an int value is given on the command line

    int argval = Integer.parseInt(args[0]);

    System.out.println("squared:" + instance.square(argval));
    System.out.println("area:" + instance.areaOfCircle(argval));

  }

   // instance variable definitions, if any

   // method definitions that pertain to actions that Something can be 
   // asked to do


  public int square(int arg) {
    int result;

    // Add code here to compute arg * arg and save the result in
    // the local variable result

    return result;
  }

  public double areaOfCircle( int radius ) {

    double result;
    
    // Add code here to compute the area if a circle whose radius
    // is given: area = Pi * (radius squared)
    // Hint: Java defines a constant Math.PI
    
    return result;
  }

}