Programming Assignment #117

Code

import java.util.Scanner;

public class Puzzle{

    public static void main(String[] args){
        Scanner k = new Scanner(System.in);
        
        while(true){
            System.out.println("1) Find two digit numbers <= 56 with sums of digits > 10");
            System.out.println("2) Find two digit number minus number reversed which equals sum of digits");
            System.out.println("3) Quit");
            System.out.println();
            System.out.print(">");
            
            int choice = k.nextInt();
            if(choice == 1){
                for(int i = 1; i <= 9; i++){
                    for(int u = 0; u <= 9; u++){
                        String sNum = i + "" + u;
                        int num = Integer.parseInt(sNum);
                        if(num <= 56 && i + u > 10){
                            System.out.println(num);
                        }
                    }
                }
            }
            else if(choice == 2){
                for(int i = 1; i <= 9; i++){
                    for(int u = 0; u <= 9; u++){
                        String sNum = i + "" + u;
                        String rsNum = u + "" + i;
                        int num = Integer.parseInt(sNum);
                        int rNum = Integer.parseInt(rsNum);
                        
                        if(num - rNum == i + u){
                            System.out.println(num);
                        }
                        
                    }
                }
            }
            else{
                break;
            }
        
        }
    }

}
  

Outputs