/********************
 * SampleProgram
 *
 * reads user input with King's jpb package from the "Java Programming" book.
 * See http://knking.com/books/java/jpb/index.html and pg 63 of the text.
 *
 *********************/

import jpb.*;							// Define classes in jpb/

class SampleProgram {

    public static void main(String args[]){			// main() method

	SimpleIO.prompt(" Type in a number: ");			// Ask user for input

	String userInput = SimpleIO.readLine();			// Get the input as a string.

	double x = Convert.toDouble(userInput);			// Convert string to double.

	double y = Math.sqrt(x);				// Take square root.

	System.out.println(" Its square root is " + y );	// Display result.

    }

}