Digits in a number Learn programming Java

Lesson:

Flow Control

Exercise:

Digits in a number

Objetive:

Create a java program to calculate the number of digits in a positive integer (hint: this can be done by repeatedly dividing by 10). If the user enters a negative integer, the program should display a warning message and proceed to calculate the number of digits for the equivalent positive integer.

For example:
Number = 32
2 digits
Number = -4000
(Warning: it is a negative number) 4 digits

Code:

import java.util.*;
public class Main
{
	public static void main(String[] args)
	{
		int number;
		int digit = 0;

		System.out.print("Number? ");
		number = Integer.parseInt(new Scanner(System.in).nextLine());

		if (number < 0)
		{
			System.out.println("(Warning: it is a negative number)");
			number = -number;
		}

		while (number > 0)
		{
			number = number / 10;
			digit++;
		}

		if (digit == 0)
		{
			digit = 1;
		}

		System.out.printf( digit + " digits" + "\r\n");
	}
}