In this post I am going to discuss a program called, **E**ntered **Number A Spy Number Or Not** **Through PHP 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**:

<?php // PHP program to check // a spy number // Function to check // spy number function checkSpy($num) { $digit; $sum = 0; $product = 1; while ($num > 0) { $digit = $num % 10; // getting sum // of digits $sum += $digit; // getting product // of digits $product *= $digit; $num = $num / 10; } if ($sum == $product) return 1; else return -1; } // Driver code $num = 1412; if (checkSpy($num)) echo "The number is a ". "Spy number","\n"; else echo "The number is NOT ". "a spy number","\n"; // This code is contributed by ajit. ?>

##### Case-1:

`The number is a Spy Number`

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