Question

Define a function int maxDigit(int num)- to find and return the greatest digit from the argument van Also, write a function void result() by passing parameters to print the greatest digit.​

Answer 1

$\textsf{\large{\underline{Solution}:}}$

The given problem is solved using language - Java.

import java.util.Scanner;

public class Program{

   public static void main(String s[]){

       Scanner sc=new Scanner(System.in);

       Program obj=new Program();

       System.out.print("Enter a number (0-9): ");

       System.out.println("The greatest digit is: "+obj.maxDigit(sc.nextInt()));

   }

   int maxDigit(int num){

       return num==0?0:Math.max(num%10,maxDigit(num/10));

   }

}

$\textsf{\large{\underline{Explanation}:}}$

• The function maxDigit() returns the highest digit of a number using recursion.
• The function is then called inside main() so as to find out the greatest digit present in the number.
• Note: Scanner class is imported so as to take the number as input from the user using nextInt() method.

See the attachment for output.