# C# Program to find the sum of first and last digit of a number

In this program, You will learn how to find the sum of first and last digit of a number in C#.

`1234 = 1 + 4 => 5`

## Example: How to find the sum of first and last digit of a number in C#.

```
using System;
public class Program
{
public static void Main(string[] args)
{
int n, r, sum, rev = 0, fd = 0, ld = 0;
Console.Write("Enter a number:");
n = Convert.ToInt32(Console.ReadLine());
ld = n % 10;
while (n > 0)
{
r = n % 10;
rev = rev * 10 + r;
n = n / 10;
}
fd = rev % 10;
sum = fd + ld;
Console.WriteLine("Sum of first and last digit:" + sum);
}
}
```

#### Output:

```
Enter a number:3424
Sum of first and last digit:7
```