public class W05N01
{
	public static void main(String[] args)
	{      
		// Math.abs() example
		double d1 = IO.readDouble("Your number: ");
		System.out.println("absolute value of d is " + Math.abs(d1));
		
		// Math.pow() example
		double d2 = IO.readDouble("Your number: ");
		double d3 = IO.readDouble("Your number: ");
		System.out.println("result = " + Math.pow(4 * d1, d2)/d3);
	}
	
	
	// Here is a local method that does what Math.abs() does
	public static double abs(double d)
	{
		double retVal = d;
		if (d < 0)
			retVal = -d;
		return retVal;
	}

}