Question

Writing in Java, write a program that prompts the user to input an integer and then outputs both the individual digits of the number and the sum of the digits. For example, the program should: ouput the individual digits of 3456 as 3 4 5 6 and the sum as 18, output the individual digits of 8030 as 8 0 3 0 and the sum as 11, output the individual digits of 2345526 as 2 3 4 5 5 2 6 and the sum as 27, output the individual digits of 4000 as 4 0 0 0 and the sum as 4, and output the individual digits of -2345 as 2 3 4 5 and the sum as 14.

Answer 1

To write a program in Java that prompts the user to input an integer and outputs both the individual digits of the number and the sum of the digits, you can follow these steps.

Step-by-step explanation:

To write a program in Java that prompts the user to input an integer and outputs both the individual digits of the number and the sum of the digits, you can follow these steps:

1. Import the Scanner class from the java.util package.
2. Create a Scanner object to read user input.
3. Prompt the user to enter an integer and store the input in a variable.
4. Convert the integer to a string using the toString() method.
5. Loop through each character in the string using a for loop.
6. Parse each character back to an integer and output it.
7. Sum up all the digits using a variable to keep track of the running total.
8. Output the sum of the digits.

Here's an example implementation:

import java.util.Scanner;

public class DigitsAndSum {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

System.out.print("Enter an integer: ");
int number = scanner.nextInt();

String numberString = Integer.toString(number);
int sum = 0;

for (int i = 0; i < numberString.length(); i++) {
int digit = Character.getNumericValue(numberString.charAt(i));
System.out.print(digit + " ");
sum += digit;
}

System.out.println();
System.out.println("Sum: " + sum);
}
}

Answer 2

//Here is code in java.

import java.util.*;

class Main

{

public static void main (String[] args) throws java.lang.Exception

{

try{

int in;

//scanner class object to read the input

Scanner scr=new Scanner(System.in);

// variable to keep running total

int total=0;

System.out.println("please enter an Integer:");

// read the input first time

in=scr.nextInt();

System.out.print("individual digits of "+in+" is ");

if(in<0)

{

in=-(in);

}

//call the function to print the digits of number

print_dig(in);

System.out.println();

//calculate the sum of all digits

do{

int r=in%10;

total=total+r;

in=in/10;

}while(in>0);

//print the sum

System.out.println("total of digits is: "+total);

}catch(Exception ex){

return;}

}

//recursive function to print the digits of number

public static void print_dig(int num)

{

if(num==0)

return;

else

{

print_dig(num/10);

System.out.print(num%10+" ");

}

}

}

Step-by-step explanation:

Read a number with the help of object of scanner class.if the input is negative

then make it positive number before calling the function print_dig().call

the recursive method print_dig() with parameter "num".It will extract the digits

of the number and print then in the order. Then in the main method, calculate

sum of all the digits of number.

Output:

please enter an Integer:

3456

individual digits of 3456 is 3 4 5 6

total of digits is: 18

please enter an Integer:

-2345

individual digits of -2345 is 2 3 4 5

total of digits is: 14