Question

write a menu driven program in Java to print all the unique number from 100 to 1000..
[unique number means digits are not repeated]​

Answer 1

Answer:

Java code

Explanation:

import java.util.Scanner;

public class Exercise39 {

public static void main(String[] args) {

int amount = 0;

for(int i = 1; i <= 4; i++){

for(int j = 1; j <= 4; j++){

for(int k = 1; k <= 4; k++){

if(k != i && k != j && i != j){

amount++;

System.out.println(i + "" + j + "" + k);

}

}

}

}

System.out.println("Total number of the three-digit-number is " + amount);

}

}