Question

Use an endless loop structure (with a sentinel escape) to count the number of digits in any input integer.

Sample output: Enter the integer ( -99 to exit) : 16

                           16 has 2 digits

                           Enter the integer ( -99 exit): 12345

                           12345 has 5 digits

                           Enter the integer (-99 to exit): -99

**Write program in JAVA**

Answer 1

import java.util.Scanner;

public class DigitsCount {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n;
        do {
            System.out.print("Enter the integer (-99 to exit): ");
            n = in.nextInt();
            if (n != -99) {
                int count = 0;
                int num = n;
                while (num > 0) {
                    ++count;
                    num /= 10;
                }
                System.out.println(n + " has " + count + " digits");
            }
        } while (n != -99);
    }
}