# Write A Program To Check Entered Number Is A Spy Number Or Not Through C# Program

In this post I am going to discuss a program called, Entered Number A Spy Number Or Not Through C# Program.

## What is a Spy Number?

When you enter a natural number like 1124 then sum up its digit is equal to the product of all the digits. Like,

``````//Example:
Suppose n=1124
Product of digits on prod=(1 * 1 * 2 * 4) = 8
Sum of digits on sum=(1 + 1 + 2 + 4) = 8
Here, sum==prod both product and sum are equal.
Output: Spy Number

Input : 1412
Explanation :
sum = (1 + 4 + 1 + 2) = 8
product = (1 * 4 * 1 * 2) = 8
since, sum == product == 8
Output : Spy Number

Input : 132
Explanation :
sum = (1 + 3 + 2) = 6
product = (1 * 3 * 2) = 6
since, sum == product == 6
Output : Spy Number``````

## C program to check number is a spy number or not:

```// C# program to check
// Spy number
using System;

class ABC
{

// boolean function to
// check Spy number
static bool checkSpy(int input)
{

int digit, sum = 0,
product = 1;
while (input > 0)
{
digit = input % 10;

// getting the sum
// of digits
sum += digit;

// getting the product
// of digits
product *= digit;
input = input / 10;
}

// Comparing the sum
// and product
if (sum == product)
return true;
else
return false;
}

// Driver code
public static void Main()
{
int input = 1412;
if (checkSpy(input))
Console.WriteLine("The number is " +
"a Spy number");
else
Console.WriteLine("The number is " +
"NOT a Spy number");
}
}

// This code is Contributed by vt_m.```
##### Case-1:
``The number is a Spy Number`` 