﻿ C# - Check a number is uban number or not

# C#: Check a number is uban number or not

## C# Sharp Math: Exercise-26 with Solution

From numbersaplenty -
A number nis called uban if its name (in English) does not contain the letter "u".
In particular, it cannot contain the terms "four", "hundred", and "thousand", So the uban number following 99 is 1000000.
Here are some uban numbers:
The first 600 uban numbers :
1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78, 79, 80, 81, 82, 83, 85, 86, 87, 88, 89, 90, 91, 92, 93, 95, 96, 97, 98, 99, 1000000, 1000001, 1000002, 1000003, 1000005, 1000006,....

Write a C# Sharp program that takes an integer and determines whether it is uban or not.

Sample Data:
(63) -> True
(100) -> False
(100000) -> False
(1000005) -> True

Sample Solution:

C# Sharp Code:

``````using System;
using System.Linq;
namespace exercises
{
class Program
{
static void Main(string[] args)
{

int n = 63;
Console.WriteLine("Original Number: " + n);
Console.WriteLine("Check the said number is uban number or not: " + test(n));
n = 100;
Console.WriteLine("Original Number: " + n);
Console.WriteLine("Check the said number is uban number or not: " + test(n));
n = 100000;
Console.WriteLine("Original Number: " + n);
Console.WriteLine("Check the said number is uban number or not: " + test(n));
n = 1000005;
Console.WriteLine("Original Number: " + n);
Console.WriteLine("Check the said number is uban number or not: " + test(n));
}

public static bool test(int n)
{

if (n > 999 && n <= 999999)
{
return false;
}
else if (n > 999999)
{
return true;
}
else if (n > 99)
{
return false;
}
else
{
return n % 10 != 4;
}

}
}
}
```
```

Sample Output:

```Original Number: 63
Check the said number is uban number or not: True
Original Number: 100
Check the said number is uban number or not: False
Original Number: 100000
Check the said number is uban number or not: False
Original Number: 1000005
Check the said number is uban number or not: True
```

Flowchart:

C# Sharp Code Editor:

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