# Digits in a number - Tutorial C# Sharp

## Lesson 2:

## Flow Control

## Exercise 2.24:

## Digits in a number

## Objetive:

##
Create a program to calculate how many digits has a positive integer (hint: it can be done by dividing by 10 several times).
If the user enters a negative integer, the program must show a warning message, and proceed with the equivalent positive number.

For example:

Number = 32

2 digits

Number = -4000

(Warning: it is a negative number) 4 digits

## Source Code:

```
using System;
public class exercise041
{
public static void Main()
{
int number;
int digit = 0;
Console.Write("Number? ");
number = Convert.ToInt32(Console.ReadLine());
if (number < 0)
{
Console.WriteLine("(Warning: it is a negative number)");
number = -number;
}
while (number > 0)
{
number = number / 10;
digit++;
}
if (digit == 0)
digit = 1;
Console.WriteLine("{0} digits", digit);
}
}
```

Exercisey
2.24