In this program, you will learn how to find the sum of digits of a number using recursion in java.

```
4321 => 4 + 3 + 2 + 1
1232 => 1 + 2 + 3 + 2
```

## Example: How to find the sum of digits of a number using recursion in java.

```
import java.util.Scanner;
class Main {
int s = 0, r;
int sumOfDigits(int n) {
if (n > 0) {
r = n % 10;
s = s + r;
sumOfDigits(n / 10);
}
return s;
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter a number:");
int n = sc.nextInt();
Main obj = new Main();
int sum = obj.sumOfDigits(n);
System.out.println("Sum of digits:" + sum);
}
}
```

#### Output:

```
Enter a number:4326
Sum of digits:15
```