public class ex_2_2_1 
{
	public static void main(String args[]) 
	{
		int x; 
		x = 10;
		if(x == 10) 
		{ 
			int y = 20; 
		
			System.out.println("x和y的值分別為: " + x + " " + y);
			x = y * 2;
		}
		
		System.out.println("x的值為" + x);
	}
}