/* * lesson 7 coding activity question 1 * * input a positive three digit integer. print out the digits one per line. * * sample run: enter a three digit number: 678 here are the digits: 6 7 8 */ import java. util. scanner; import java. lang. math; class lesson_7_activity_one { public static void main(string[] args) { /* write your code here * copy and paste your entire code to code runner to complete the activity, * from the first import statement to the last bracket. */ scanner scan = new scanner (system. in); system. out. println(" enter a three digit number: "); int num= scan. nextint(); int first = num % 10; int second = ( num - first ) % 100 / 10; int third = ( num - first - second ) % 1000 / 100; system. out. println("here are the digits: "); system. out. println(first); system. out. println(second); system. out. println(third); } }

The program illustrates the use of arithmetic operation; most especially, the modulo operation.

A modulo operator (represented as %) returns the remainder after two integers are divided

Take for instance:

The result is 2, because when 5 is divided by 3, the remainder is 2

The modified program in java, where comments are used to explain each line is as follows:

import java.util.Scanner;

import java.lang.Math;

class Lesson_7_Activity_One {

public static void main(String[] args) {

//This creates a scanner object

   Scanner scan = new Scanner (System.in);

//This prompts the user for a three-digit number

   System.out.println("Please enter a three-digit number:");

//This gets the input from the user

   int num= scan.nextInt();

//This calculates the first digit using the modulo operator

   int first = (num - num % 100)/100;

//This calculates the remainder

  num -= first * 100;

//This calculates the second digit using the modulo operator

   int second = (num - num % 10)/10;

//This calculates the third digit

   int third = num -second * 10;

//This prints the output header

   System.out.println("Here are the digits: ");

//This prints the first digit

   System.out.println(first);

//This prints the second digit

   System.out.println(second);

//This prints the third digit

   System.out.println(third);

}

}

At the end of the program, the first, second and third digit of the number are printed.

See attachment for sample run

Read more about modulo operator at:

link

In stead of going number arithmetic, you could also approach it as string handling. Replace the last lines of your code (right after the scan statement) with:

String s = Integer.toString(num);

System.out.println("Here are the digits: ");

System.out.println(s.charAt(0)+"\n"+s.charAt(1)+"\n"+s.charAt(2));

answer; availability;