Java Program to find the largest digit of a number using recursion


In this program, you will learn how to find the largest digit of a number using recursion in Java.


123 => 3

2341 => 4


Example: How to find the largest digit of a number using recursion in Java

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import java.util.Scanner;

class Main {
    int lar = 0, r;


    int largestDigit(int n) {

        if (n > 0) {
            r = n % 10;
            if (lar < r)
                lar = r;
            largestDigit(n / 10);
        }

        return lar;
    }

    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 lar = obj.largestDigit(n);

        System.out.println("\nLargest digit : " + lar);


    }
}

Output:

Enter a number : 2341
Largest digit : 4