Sure, here is a step by step guide to develop a Java program to check whether a given number is a Narcissistic number or not. Step 1: Import the necessary libraries. In this case, we only need the Scanner class for user input. ```java import java.util.Scanner; ``` Step 2: Define the main class and the main method. ```java public class Main { public static void main(String[] args) { ``` Step 3: Create a Scanner object to get the user input. ```java Scanner scanner = new Scanner(System.in); ``` Step 4: Get the input number from the user. ```java int n = scanner.nextInt(); ``` Step 5: Check the boundary conditions. If the number is not within the range, print 'invalid' and return. ```java if(n 10000) { System.out.println("invalid"); return; } ``` Step 6: Calculate the number of digits in the number. ```java int num = n; int digits = 0; while(num != 0) { digits++; num /= 10; } ``` Step 7: Check if the number is a Narcissistic number. A number is a Narcissistic number if the sum of its digits each raised to the power of the number of digits is equal to the number itself. ```java num = n; int sum = 0; while(num != 0) { int digit = num % 10; sum += Math.pow(digit, digits); num /= 10; } ``` Step 8: If the sum is equal to the number, print 'yes'. Otherwise, print 'no'. ```java if(sum == n) { System.out.println("yes"); } else { System.out.println("no"); } ``` Step 9: Close the main method and the main class. ```java } } ``` That's it! This is a simple Java program to check if a given number is a Narcissistic number or not.

Question

Sure, here is a step by step guide to develop a Java program to check whether a given number is a Narcissistic number or not.

Step 1: Import the necessary libraries. In this case, we only need the Scanner class for user input.

```java
import java.util.Scanner;
```

Step 2: Define the main class and the main method.

```java
public class Main {
    public static void main(String[] args) {
```

Step 3: Create a Scanner object to get the user input.

```java
Scanner scanner = new Scanner(System.in);
```

Step 4: Get the input number from the user.

```java
int n = scanner.nextInt();
```

Step 5: Check the boundary conditions. If the number is not within the range, print 'invalid' and return.

```java
if(n <= 0 || n > 10000) {
    System.out.println("invalid");
    return;
}
```

Step 6: Calculate the number of digits in the number.

```java
int num = n;
int digits = 0;
while(num != 0) {
    digits++;
    num /= 10;
}
```

Step 7: Check if the number is a Narcissistic number. A number is a Narcissistic number if the sum of its digits each raised to the power of the number of digits is equal to the number itself.

```java
num = n;
int sum = 0;
while(num != 0) {
    int digit = num % 10;
    sum += Math.pow(digit, digits);
    num /= 10;
}
```

Step 8: If the sum is equal to the number, print 'yes'. Otherwise, print 'no'.

```java
if(sum == n) {
    System.out.println("yes");
} else {
    System.out.println("no");
}
```

Step 9: Close the main method and the main class.

```java
    }
}
```

That's it! This is a simple Java program to check if a given number is a Narcissistic number or not.

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