How do i return the value of count from my while loop in Java

Question

I'm new to coding and I'm required to have a return statement but I'm struggling on how to return the values of count from my while loop. I put a link of picture of what I'm getting plus my code is below.

Also I added a printout of "is factor of number " + count just so I can see what count is doing during the while loop. What I really want to do is return these values so when I hit run these values and only these values appear.

Here is my code:

package allFactors;

public class AllFactors {

    public static void main(String[] args) {
        System.out.println(printFactors(25));
    }

    public static int printFactors(int number) {
        if (number < 1) {
            System.out.println("Invalid Value ");
        }

        int count = 0;
        while (count <= number) {
            count++;

            if (number % count == 0) {
                System.out.println(count + " is factor of number ");
                continue;
            }
        }
        return count;
    }
}

my CURRENT output is as follows:

1 is factor of number

5 is factor of number

25 is factor of number

26

i only put system.out.println(count + " is factor of number "); BECAUSE i want to see what my count value is, NOW i dont want to return count; because that just gives me 26, i want to JUST return 1, 5 and 25. Because these numbers are all factors of 25; once i can do this i will delete my system.out.println(count + " is factor of number "); line of code because it is not necessary. I hope this question make sense

DESIRED OUTPUT

1

5

25

my current output is: 1 is factor of number 5 is factor of number 25 is factor of number 26 desired output is: 1 5 25 — Altoids weed
– Altoids weed, Commented Jun 18, 2020 at 18:10
for some reason i cannot type or copy paste my output in more understandable and realistic view, i added outcome in original question and it is pretty close to what i see on screen, i hope you can see it there and it helps. — Altoids weed
– Altoids weed, Commented Jun 18, 2020 at 18:16
A function in java can return only one value/object. If you want to return multiple values from a function, you must create a Collection of all the values and return that. — nilup
– nilup, Commented Jun 22, 2020 at 17:02

shaista ambreen · Accepted Answer · 2020-06-18 17:39:07Z

Here you want to return all the factors of the number : So you can use the list to store all the factors and then return that list and print it, code is this -

    package allFactors;

    public class AllFactors {
       public static void main(String[] args) {
           printFactors(32).forEach(System.out::println);
       }

       public static List<Integer> printFactors(int number) {
           if (number < 1) {
                System.out.println("Invalid Value ");
           }
           List<Integer> all_factors = new ArrayList<>();
           int count = 0;
           while (count <= number) {
               count++;
               if (number % count == 0) {
                   all_factors.add(count);
                   System.out.println(count + " is factor of number ");
                   continue;
               }
           }
          return all_factors;
      }
    }

Robotic Reaper · Accepted Answer · 2020-06-18 17:11:57Z

0

return is like the output of your function. In the code you said return 0, so no matter what, it will only print 0. Change it to return count; is how you do it.

answered Jun 18, 2020 at 17:11

Robotic Reaper

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Comments

Tanmoy Majumdar · Accepted Answer · 2020-06-18 17:15:09Z

0

just return the count from the end of the method as follows

public static int printFactors(int number) {
    if (number < 1) {
        System.out.println("Invalid Value ");
    }

    int count = 0;
    while (count <= number) {
        count++;

        if (number % count == 0) {
            System.out.println(count + " is factor of number ");
            continue;
        }
    }
    return count;
}

answered Jun 18, 2020 at 17:15

Tanmoy Majumdar

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1 Comment

Altoids weed Over a year ago

please look back at my question i just updated it, thanks for trying to help!

Shalaj · Accepted Answer · 2020-06-18 18:08:23Z

0

if you want to return all values you need to use some collection please check below code

package allFactors;

import java.util.ArrayList;
import java.util.List;

public class AllFactors {

public static void main(String[] args) {
    System.out.println(printFactors(32));
}

public static List<Integer> printFactors(int number) {
    if (number < 1) {
        System.out.println("Invalid Value ");
    }
    List<Integer> factors = new ArrayList<>();
    int count = 0;
    while (count <= number) {
        count++;

        if (number % count == 0) {
            factors.add(count);
            System.out.println(count + " is factor of number ");
        }
    }
    return factors;
 }
}

edited Jun 18, 2020 at 18:08

answered Jun 18, 2020 at 17:22

Shalaj

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