import java.util.*;

public class WhileDemo {

	public static void main(String[] args) {
         Scanner scan = new Scanner(System.in);
         int num;
         int sum = 0;
        
         int count = 1;
         while (count <= 3){        
             System.out.println("Enter number: ");
             num = scan.nextInt();         
             sum = sum + num;
             count++;
         }
         
         System.out.println("Sum = " + sum);
         
	}

}