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

In this post I am going to discuss a program called, Entered Number A Spy Number Or Not Through JavaScript 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:

```<script>

// Javascript program to check
// a spy number

// Function to
// check spy number
function checkSpy(num)
{
let digit, sum = 0,
product = 1;
while (num > 0)
{
digit = num % 10;

// getting sum of digits
sum += digit;

// getting product of digits
product *= digit;
num = Math.floor(num / 10);
}

if (sum == product)
return true;
else
return false;
}

// Driver code

let num = 1412;
if (checkSpy(num))
document.write("The number is "
+ "a Spy number"
+ "<br>");
else
document.write("The number is "
+ "NOT a spy number"
+ "<br>");

// This code is contributed by Mayank Tyagi

</script>```