Loops - execise no 03, slide no 64

package class170629;

import java.util.Scanner;

public class LoopsEx03Slide64 {

    public static void main(String[] args) {
        // input: integer number. example: 512624
        // output: maximum digit in the number. example: 6

        // create a scanner
        Scanner s = new Scanner(System.in);

        // ask for input
        System.out.print("Enter an integer number: ");
        // get and save input value
        int n = s.nextInt();

        // close scanner
        s.close();

        int maxDigit = n % 10; // calculated: maximum digit so far
        int tmp = n / 10; // calculated: number with digits to be checked

        // while there are more digits to check
        while (tmp > 0) {
            // calculate most right digit
            int digit = tmp % 10; // calculated: current digit to be checked

            // if even digit then
            if (digit > maxDigit) {
                // set it to be the maximum
                maxDigit = digit;
            }
            tmp /= 10; // drop this digit and continue to check the others
        }

        // display output on the screen
        System.out.printf("n=%d , maximum digit=%d\n", n, maxDigit);
    }
}