How to print each number of a given number separately?

Question

I have a code is written that is supposed to print each of the numbers separately. Heres an example.

printDigits(1362) prints
2
6
3
1

printsDigits(985) prints
5
8
9

You can pull apart a number into its digits using / 10 and % 10.

I have started some code the way I was taught but I am not sure what to do with the other variables. Please have a look:

public class Main {

  public static void main(String[] args) {
    System.out.println(printDigits(1362));
    System.out.println(printDigits(985));
    }

  public static int printDigits(int x){
    int y = x % 10;
    while (x > 0){
      x = y;
      System.out.println(x);
      x = x / 10;
    }
   return x;
   }
}

`int y = x % 10;` needs to be inside the loop. Get rid of `x = y` and change `System.out.println(x)` to `System.out.println (y)` — Bradley, Nov 13 '19 at 06:29

score 1 · Answer 1 · answered Nov 13 '19 at 06:33

1

Why don't you convert the parameter x to String then read each Char in the String since a String is array of Char. If the output must be an int you convert the Char to int.

answered Nov 13 '19 at 06:33

Eliano

23
2

This is best I think – 91StarSky Nov 13 '19 at 07:05

tobsob · Answer 2 · 2019-11-13T09:00:00.810

0

You need to write int y = x % 10; inside the loop to "pull apart" every digit and print the digit y you have "pulled out". Remove the System.out.println around your function calls. You don't need to return a number, so you can change your return type to void:

public class Main {
    public static void main(String[] args) {
        printDigits(1362);
        System.out.println();
        printDigits(985);
    }

    public static void printDigits(int x) {
        while (x > 0) {
            int y = x % 10;
            System.out.println(y);
            x = x / 10;
        }
    }
}

edited Nov 13 '19 at 09:00

answered Nov 13 '19 at 06:34

tobsob

602
9
22

How is `void` method returning a value? – Mushif Ali Nawaz Nov 13 '19 at 08:26
It is not returnig a value. The function is already printing the numbers. So you don't need to. – tobsob Nov 13 '19 at 08:42
1

Then what is `return x` doing here? – Mushif Ali Nawaz Nov 13 '19 at 08:43

score 0 · Answer 3 · answered Nov 13 '19 at 06:34

printDigits method should be like this:

public static void printDigits(int x) {
    int y;
    while (x > 0) {
        y = x % 10;
        System.out.println(y);
        x = x / 10;
    }
}

And the calling of the method will be like this:

printDigits(1362); // without the System.out.println()

score 0 · Answer 4 · answered Nov 13 '19 at 06:44

0

There are various ways to achieve such results. You can better understand all solutions in these answers.

answered Nov 13 '19 at 06:44

Usama Azam

403
5
13

score 0 · Answer 5 · answered Nov 13 '19 at 07:36

0

public static void printDigits(int num) {
    while(num>0) {
        int remainder = num%10;
        num = num/10;
        System.out.println(remainder);
        printDigits(num);
    }

}

You can use recursion to make it even more efficient.

answered Nov 13 '19 at 07:36

VSharma

471
4
8

How to print each number of a given number separately?

5 Answers5