// NicerLoopingForever.java

class NicerLoopingForever {
	
	public static void main(String[] args) {
		// describe the program
		System.out.println("This program demonstrates using a 'while' loop");
		System.out.println("to loop endlessly.  In this version, you can enter");
		System.out.println("0 to exit.");
		
		// declare an integer variable
		int x;
		
		// loop forever
		while (true) {
			// read in a value for x
			System.out.println();
			System.out.print("Enter an integer value [or 0 to exit]: ");
			x = readInt();
			
			// if the user entered 0, exit the program
			if (x == 0) {
				System.exit(0);
			}
			
			// check if it's divisible by 2
			if (x % 2 == 0) {
				System.out.println("This number IS divisible by 2");
			}
			else {
				System.out.println("This number is NOT divisible by 2");
			}			
		}
	}
	
	///////////////////////////////////
	// readString, readInt, readDouble
	///////////////////////////////////
	
	public static String readString() {
		java.io.InputStreamReader isr = new java.io.InputStreamReader(System.in);
		java.io.BufferedReader d = new java.io.BufferedReader(isr);
		try { return d.readLine(); } catch (Exception e) { return "error"; }
	}
	public static int readInt() { return Integer.parseInt(readString()); }
	public static double readDouble() {
		return Double.valueOf(readString()).doubleValue();
	}
}